This magazine focuses both on professional musicians and on musicians just starting out. I’ve found it quite useful when learning how to compose music.
That is to say, it explains terms such as compression, equalizing, normalization, building up tracks, plug ins and so on.
Give it a try
oh and one more thing, actually, this page http://www.tweakheadz.com/guide.htm really had me hooked at one point. it really does a great job in explaining how music “works” it explains it in a very pedagogical way (is that even a word?)
Composition for Dummies is quite a useful starting point. It goes well with the Music Theory dummies book, which I thought was a very good introduction. I also found Dave Stewart’s Musician’s Guide to Reading and Writing Music, and Inside the Music to be useful too.
But yes, composition and production are different disciplines!