Best learning tool?

Well I am just looking for the best way to learn more about mobile audio. I have always been the go to guy among my group of friends when it comes to anything electrical be it stereo or hooking up a 220v for a house. I have been happy with that but now I would like to learn more about tuning an audio system or building a box and tuning it for a certain sub. What would be the best way to do this. Books are probably my first choice because working full time and on the side its hard to find time. Also where would I look to find any type of mobile electronics schools in my area?

Thanks in advance!

Read all that you can, Thats what i do.
To build sub boxes, read about how to first then try it.

My first sub box was for a friends 12 alpine type E. It was a simple 14 cube but it sure did sound nice. I didnt use glue the first time i put it together but it was still sturdy. I used a hell of a lot of screws. Then one night when i was bored i used elmers school glue, and yes the kind for school. Screwed it back and waited for it to dry.   After it dried i removed the screws to check for strength and damn i was surprised by the strength. Stronger than the screws themselves.

Also ask all of the questions that you can.

Honestly, the people on this forum have taught me more than all my MECP and other car audio books combined. There are some downright car audio geniuses on here.

If you want books though, the MECP study guides are a great source of info. I hear the Loudspeaker Design Cookbook is very good also and that one is next on my list.

MECP Study Guides: LINK
LDC: LINK

The Loudspeaker Design Cookbook might be a bit advanced for many beginners.  Instead I highly recommend you reading through this link: www.bcae1.com .  It has great flash animations to help the beginner understand even the more complex concepts.  And of course this site is a huge resource of information.  Look through all technical information in the links on the side, as well as reading and asking questions in the forum.  This forum has some of the most helpful and knowledgable people around.

Awesome, thanks a lot guys!

There is a lot of very useful knowledge floating around this site, I have learned more from this site than any class I took or books I've read. Ask lots of questions and the only stupid question is one you don't ask.  Sub box building is an art imo, I am the only shop in my area that still builds custom boxes and the last tip I'll give ya for now is that the box can make a crappy sub sound good and a good sub sound crappy....

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Even us old dogs still learn a thing or two from the others of this site. Just last month Jeff showed me a different method of sanding bondo, while I showed him how I do vinyl work around corners. There is a wealth of knowledge on this forum, if you want to learn, this is the place to look for answers.

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Top Secret, I can tell you but then my wife will kill me.