The only real requirements are: 1) the title and authors are on the cover which is: Drumopedia! A Handbook for Beginning Drumset by Dan Britt with Shahmir Kamalian, MD. The "with Shahmir Kamalian, MD" will be in smaller print than "by Dan Britt".
2) the cover has a regular 5 piece drumset (ideally with no company brand) with the 3 basic cymbal part - 1) the hi-hat [the 2 that go together], and 2 cymbals (one on each side). (This is the typical kind of picture of a drumset). Here is a picture of the setup from a different book: http://musicbooksplus.com/images/AP1313.jpg
3) This testimonial fits on it: “Dan Britt is one of the most forward thinking drummers/educators in the industry." - Terry Silverlight (The Sopranos Show Music Contributor/Paul Shaffer/George Benson). If there's not enough room, George Benson could be taken out.
One possible idea (but not at all a requirement) is to have the Bass Drum of the Drumset be the "O" in Drumopedia. Just an idea.
If you can make it look like a Fun and Educational cover at the same time, that would be great, Thanks very much!!....
I have a very large "reach" on the internet and even the ones I do not pick I can promote in the sense that a large amount of people can see your name and work (if you opt) on some of my facebook pages, so you can let me know and I can list your name and link!