Practical Studies for the Trumpet by Edwin Franko Goldman (edited by Joey Tartell)

Canadian Brass Trumpeter, Caleb Hudson, highly recommends this book for study. 

Edwin Franko Goldman's Practical Studies for the Trumpet, edited by Joey Tartell is a terrific tool for addressing issues that all trumpet players encounter. This book can be used to introduce concepts to young students as well as fine tune the same concepts to advanced students.