I haven't used any books yet so far in the hobby. I have found success through this forum and backed up sites...for difficult species I wanted to keep I was able to find college level material on keeping them.
When I go to my LFS
, I simply use my phone for any info on something I'm not familiar with. I use liveaquaria.com and recently added aquaribase to my phone to fiddle around with. For the most part, LA will answer any questions you could have IMO
Is there something more specific you are looking for that this wouldn't cover?