First I apologize if this is in the wrong place. I searched a couple times...because I thought I remembered a "music theory" section of this place...but I can't find it now. If there isn't one, it would be cool to have one...for me lol.

I know very little about theory. I know many of the popular chords, some of them would take me a second to tell you what the 3-5-7's are etc.

Hey, guys. I'm looking to delve into music theory and composition/arrangement this summer. I was wondering if there exist any books geared towards composing/arranging for a small instrumental ensemble (small orchestra?). The only book I could find with similar content dealt with arranging for small to medium jazz ensembles. Are there any books you all would recommend on either subject?