Warhammer 40k - Lexicanum:Book sources
Book sources is a Special pages tool from the category Data and tools. It allows users to search for multiple sources for a book given its 10- or 13-digit ISBN number. Be aware that this tool is quite a hit and miss.
You can also simply click here.
You can search for a book via its 10- or 13-digit ISBN number. Spaces and dashes in the ISBN number do not matter. This page links to catalogs of libraries, booksellers, and other book sources where you will be able to search for the book by its ISBN number.