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ISBN Database Software - catalog your books by ISBN

Automatically download book details by ISBNLike author, title, publisher, genres, subjects & cover art.
Just search our huge online ISBN database ... ... by ISBN or by author & title.

3 ISBN database solutions - mobile app, web-app or desktop software:

Feature comparison

Mobile app for iOS & Android

The mobile solution :

  • Install on your phone or tablet.
  • Built-in barcode scanner.
  • All data stored on your device.
  • Optional cloud storage (free).
Web-app for Windows & macOS

The "login & go" solution :

USD $24.95
Downloadable for Windows & macOS

The pro solution :


Use the free CLZ Cloud service to:

  • Synchronize your book database between the desktop software, mobile apps and the Connect web-app.
  • View your list online and share it with friends and family.
  • Always have an online backup of your book database.

Free CLZ Barry barcode scanner app

  • Scan barcodes with the camera of your phone or tablet.
  • Instantly send the scanned barcodes to the Book Collector or Book Connect software on your desktop computer.
  • Download CLZ Barry from the App Store / Play Store.

Latest software updates

Alwin and Team,
I've been using Book Collector for a number of years now and decided it was about time that I express my appreciation to you for not only developing the best "book software" product on the market, but also, for your continuing updates and frequent communications. Book Collector has more than met my needs for the 2,000+ books I've logged. So again, a well-deserved thank you to you and your staff.
P.S. I just recently purchased Movie Collector to log all of my DVDs and CDs. I'm very satisfied.
— Blaine Beckett (USA) on May 24, 2018

Reviews from customers

October 10, 2017
CLZ Books
Superb software, easy to set up and ISBN scanning via camera makes it so easy to enter my books. Wish I had found it ealier. — sgur alisdair on CLZ Books
August 05, 2017
I am having fun using the scan feature. It took a little practice but after about 10 books I feel like a pro. My book sale purchases will be loaded in no time. Except for those pre-ISBN books of course. Although they are pretty easy too. — A Google user on CLZ Books
June 26, 2017
Easy to use, syncing works well
An easy to use database for a book collection, which extends to eBooks as well as printed books. Syncing between devices is efficient, and looking up information about books - even old books before the days of ISBN - is fast. The interface is attractive. Where available, the app adds cover images automatically - but this is not always possible with older books. Books can also be added manually. — Michael Cayley on CLZ Books
June 07, 2017
Very simple
I just scan the book barcode and it's in my list, in alphabetical order by title. It doesn't have older versions of some books whose isbns have changed since the initial publishing but you can still find the book by author and title. — Adia Grigsby on CLZ Books
March 10, 2017
I just thought I would drop you a note to say how pleased I am with your software. I have previously fiddled around with several competitor products for maintaining a database of my book collection - including apps which run on Android devices as well as Windows. I came upon Book Collector for Windows last week, tried it, and found that it is easily the best product of its class - absolutely well worth the money you ask for it (and probably much more!).

I can genuinely say this is one of the best thought out database systems I have come across in quite a long time, and the all-important user interface is really well designed indeed. It is truly a joy to use & does everything I need. The automatic data-entry mechanisms & scope for maintaining pick lists etc are exactly what is required to facilitate the arduous task of data-entry, and the facilities for listing, displaying images, sorting, and printing are superb and very intuitive.

I found that the competitor products quite often failed on automatic lookups via ISBN (particularly those systems designed in the USA), whereas Book Collector has very rarely done so up to now- I'm amazed at how often it finds details for books I have which are 50 years old or more & don't show an ISBN (or even an SBN!).

So congratulations on a really brilliant piece of software - I would recommend it to anyone needing to catalogue their book collection. — G C Pearce (United Kingdom) on Book Collector

February 05, 2017
Where have you been all my library?
Fantastic app! More than just a "you enter it all yourself," it references a database and enters most of the information for you. Less than ten books entered and only two were not found. Both have ISBN numbers but seem to be self-published, so not expecting those to be found. Even $15 to get full use of the app is definitely worth the price if you have a large collection. Highly recommended! — The Kitchen Witch on CLZ Books
December 27, 2016
Love it
I've used other cataloging software and this is the best. Easy-to-use interface; cataloging by ISBN is simple. And love being able to access my collection from all my devices. — A Google user on CLZ Books
November 15, 2016
Handy when I'm book shopping
I use it to keep track of what books I have, so that when I shop I know if an interesting book would be a new addition to my library. I find it easy to add books by scanning ISBN bar code on back cover or inside cover, which works for almost all books. Older books (~40+ yrs) that don't have recognizable ISBN, I search by author and title then select to add (still relatively easy). In very rare cases I've added a book manually and included the front cover picture that I took myself. — C101481 on CLZ Books
November 07, 2016
Me gusta
Tras usar otro catalogador, éste me resulta más práctico, sobre todo al usarlo en paralelo mac-ipad. Me gusta mucho que la base de datos del isbn (lo que más uso) sea más amplia y de acceso más libre. Algunos aspectos pueden pulirse un poco, pero globalmente he mejorado. — Lpf64 on CLZ Books
November 05, 2016
Awesome update Alwin! Much more user friendly...and going to your website to add the unknown ISBN was a pain. Thanks for continuing to make the program better! — Scott James (USA) on Book Collector
October 31, 2016
Book Catalogue
Just started to use this app. Scanning of Isbn is easy and the speed of response is remarkable. Lots of customisation possible so no excuse for misplacing a book. Will probably end up paying the one off fee for use with more than 100 books. — RNW61 on CLZ Books
October 25, 2016
CLZ Books
The Book Collection Database seems really great with ISBN scanning on an Iphone. — DaiCilgeraint on CLZ Books
September 30, 2016
I love this application. Whether you have a book collection you want to want to catalog or just want to keep track of what you have read you can't beat it. Just scan the ISBN number and the app pulls in a ton on info on the book. You can create folders if you choose. Extremely useful. — Wilfred the Barbarian on CLZ Books
September 25, 2016
Fantastic app
This is a great app for looking after a book collection. It is quick and easy to add most books (simply scan the ISBN or type in the book title). — Specul8 on CLZ Books
September 07, 2016
So far so good
I've been looking for something I could inventory my collection for awhile now. This is the first I've found that allows me to scan via ISBN and manage my collection via app or PC. — Darrel Spurlock on CLZ Books
July 15, 2016
Couldn't have been simpler. Entire bookshelf in about 2 hours
Phone with scanning screen in one hand, pulling out book enough to scan isbn with other hand, set aside problem barcodes for later (additional stickers, hardback books), very very easy. Great app. If it had worked at the end of a selfie stick - I wouldn't have needed a ladder - lol — Eamonn Edwardo on CLZ Books
June 21, 2016
Easy to use
I have been very happy so far with this app. I especially like the scanning feature that allows me to scan the ISBN instead of having to type each number in by hand. The cost to upgrade storage is on par with other apps and websites I have checked out. — +(A-rOd)+ on CLZ Books
May 23, 2016
To the making of many books
This app is great. I've started cataloging my books. Pretty easy scanning the ISBN. They also have one for your music. Someday I may get to my CDs. — Kickin' heels on CLZ Books
May 08, 2016
Geweldig handig en effectief
Zeer handige app en programma op je PC, ik gebruik het op mijn iMac, altijd een overzicht van je boeken bij de hand. Ook makkelijk bij te houden welke boeken waar staan, huis, praktijk of universiteit, bijhouden wat je aan wie uitgeleend hebt. Handig toevoegen door via de app isbn nummer te scannen. Graag zou ik ook via de app willen registreren of een boek uitgeleend wordt of teruggebracht. Nu kan dat volgens mij alleen nog maar met de desktop versie. Echt een aanrader! En de licentiekosten heb je zo terug omdat je nu altijd overzicht hebt van je uitgeleende boeken. — MartinPJ on CLZ Books
March 14, 2016
If you wanna best
The best of the best I've ever seen / used. Everything works as described. The OSX version is highly complex (mean: it knows everything), yet very easy to use, and all customizable! All you can try free with the sample database, or even with 100 own books. Infinite easy to sync between OSX and iOS applications. The mobile application can also scan the ISBN, so you can promptly import a new book. If you do not find a book in the central database, you can upload, and after that everyone reach it. This is great! On the other part, the mobile version is always with me, so I know what I already have and what's on my wish list. Anywhere and anytime. This is essential! But the most superior is the SUPPORT. They are fast, nice, helpful, effective. This is at least 6 stars (from 5)! — Apple-Zed on CLZ Books

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