Check out this free resource – In the words of the author :-

The Scale Omnibus is a FREE book that describes as many as 399 distinct scales in all 12 keys, with synonyms, historical notes, chords over which the scale sounds well, summary tables, and more. It took hours of researching, typing, read-proofing, and double-checking and might easily be the most complete book on this topic.

I am very glad to offer it to instrumentalists, vocalists, composers, improvisers, students, music amateurs and all saxopedia readers.

Feel free to share this material with your fellow musicians. However, instead of passing a copy of the PDF, please point them to the current web page, so that they can download the most recent edition.

http://www.saxopedia.com/the-scale-omnibus/

The objective of The Scale Omnibus is to provide information about the many scales you can “borrow”
from all over the world, from Western composers of the past to jazz and rock improvisers of the present.