Cyntec:

Just pick and choose here:

http://www.flying-models.com/

Most are outdated regarding the last electric power technology; however, most of them can still satisfy your curiosity.

Before buying, check public libraries in your area; I have found several in mine.

The most complete (for fuel powered mid size models) that I have read and that appears in the referenced group is “Take off” by Alex Weiss.

Best regards!