I've been learning Drums for the past few months (lifelong dream, and I should have my very own kit in 36 hours or so! \o/) and my teacher has been teaching me how to sight-read. I'm doing quite well (I think), the complex exercises are usually only two bars, and the simpler exercises (i.e. snare drum only exercises focused on different beats) that are very lengthy (20+ bars) are simple enough that I can usually easily follow along with them. However, I do notice that occasionally I stumble when trying to sight-read and can't play further.
I'd like to improve my sight-reading and my general understanding of music theory, and I've seen several questions state that music theory is the same for each instrument - however does this remain true for drums since it is rhythmic rather than tonal? While I would like a basic grounding in general music theory it's more important to me to improve my drumming ability, including sight reading. Is a general music theory book still appropriate? :) (And if so, is there one you would suggest as being particularly good? Easy enough to understand for a beginner, but also in depth enough to be interesting and go fairly in-depth?)
(I'm also learning to play the Ukulele, however I don't think my teacher plans on teaching me to sight-read, as he says he can't sight-read himself.)