You could start with some interesting reading from Sound on Sound:
http://www.soundonsound.c...les/practicalaudio.htm http://www.soundonsound.c...es/audioforpicture.htm Are you keen from a music point of view or a sound design for film or video point of view.
I have got a good book by Jeff Rona as well.
http://jeffrona.com/reel-world/ Not a bad idea to research working in Logic and using timecode:
http://www.soundonsound.com/sos/jul07/articles/logictech_0707.htm There is technical stuff in terms of timecode and how that relates to tempo. Then there is the artistic stuff coming up with the best music to fit the visuals. Then there is the technical adjustments in order to fine tune the music to the hit points etc..
It is smart to get into the concept of timecode early on. A film's edit relates to timecode. Sometimes they edit the visuals to (music) temp tracks. So the vision edits still relate to time code but also to a tempo.
It is important to know what the important times are. Start of a music cue for example. You need to then work with music ideas against the vision and come up with a tempo early on. Your chosen tempo will then relate to the important vision timecode hit points.
Modern software will let you see where important times hit in relation to the grid you have set up with your tempo. Tempos can be adjusted slightly in your cues so the vision edits land on much nicer beats etc.. So first it is important to set up tempo and understand how that relates to the vision points. Then comes the job of creating the most suitable music for the vision.
Tempos in your cues may change after your initial tempo. That will alter where hit points land in the new tempo. Music for film is about a lot of time stretching and adjustments in your music to fit. A better tempo may work but the music will need to be altered accordingly. Balance of technical and art.
Search for things like 'books on working with music and timecode in modern DAW’s
Things have changed in this area and it is easier now in many respects. Make sure you are learning about music and timecode and film in modern DAW environments.