When evaluating a book, always consider the following question:
Who published the book?
The publisher of a book indicates its quality. University
presses publish books by professors and experts; therefore, the terms
"university" or "press" in a publisher name suggest
a very reliable source. Books published by professional or trade
associations, institutes, research centers, and
reputable commercial publishers are usually trustworthy, too.
On the other hand, vanity presses allow authors to pay to have
their work published and are considered much less reliable.