For many years Progressive Steps to Syncopation for the Modern Drummer (better known as just "Syncopation") by Ted Reed was virtually the only drum book I used. As I alluded to in the Joe Cusatis book post, I'm a big advocate of the interpreting-a-melody-line approach to practice, for which Syncopation is basically the Bible. Or Das Kapital, Origin of Species, whatever you like. It does have its limitations, which caused me to look into sources for similar materials. Here is a survey from my library:
Modern Reading Text in 4/4 by Louis Bellson. A classic in its own right. I find the majority of it a little too difficult for daily use- either Bellson is going way outside what is conventional in order to challenge the user, or maybe he is including things more likely to be encountered by horns. I use it primarily for its "10 Syncopated Exercises", which are long exercises similar to the ones in Reed. I haven't devised much in the way of practice methods adapted to the strengths of this book.
Odd Time Reading Text by Louis Bellson and Gil Breines. A thick book dealing with a wide variety of odd meters. There are several pages suitable for Syncopation-type applications, and quite a few more involving triplets and 16ths. Much of it is extremely difficult, in changing or */16 meters, which are frankly of limited value to me.
The Rhythm Book
by Martin Bradfield. Bradfield is a teacher in Pennsylvania who has self-published this book and two accompanying volumes of interpretive methods. Covers roughly the same territory as Syncopation, but with a number of rhythms Reed left out. Maybe the best companion volume of these, and a great value. Highly recommended.