Check a copy

Type the code printed under the tape on any cover, PDF or printout.

Edition code

8 letters and digits, such as 483B-Z9SS. O reads as 0, and I or L as 1.

Check a file

Choose a PDF or EPUB to see whether it's a file Rolling Edition released, unaltered. The file never leaves your device: your browser works out its SHA-256 hash, and only the hash is looked up.

Choose a file

What the answer means

Current: You have the latest edition.
Out of date: Newer editions exist. You'll see how many, what changed since and a link to the current one.
Not found: No Rolling Edition book has this code. Check the code: 8 letters and digits, such as 483B-Z9SS. O reads as 0, and I or L as 1.

A matching code says which edition a copy claims to be. Anyone can copy a code, so a match isn't proof that a file is ours. Checking the file itself is.

Rolling Edition

Always current. Every example runs.

Free to read and to reuse. Text is CC BY 4.0 and code is MIT. Credit Rolling Edition, link back to the book and to the licence, and say what you changed. How to credit us

Books

All books Artificial intelligence Machine learning Search and recommendation Data engineering Data science

How it works

How we make books Check a copy Contribute For assistants

Readers

Membership Supporters Your library Your account

Contact Privacy Terms

We count visits with Google Analytics to learn which books help readers. May we use cookies to do that? Privacy

Check a file

Welcome to Rolling Edition