So far I have written 2 books. One about Maya 2015 and one about Maya 2015.
Those books are covering most of the functions that Maya has and explain almost everything that can be done with the software.
Students especially like it, since it is written in the language that is spoken in the industry. With all the vocabulary that you need to work in a team.
Due to regulations, the books are just available in German in form of a book or as a download.