Our development team have worked extremely hard to ensure all of the books are accurate and error free. You can read more about that in  this article.

That said, no work of a human is perfect and we constantly receive editing requests where our honourable readers and customers point out issues and errors. We take as much of that as we can on board. Since the first editions, all of our books have had incremental changes made to them. The current editions of books that are on sale are as follows:

Previous editions of all the books are now out of print and we would advise using the current editions on sale, listed above.

The latest editions of our books are the most accurate representation of our works as we continuously update editions on yearly basis.