Hi there,
Yes, books can be a great help. I owe my salary to some of those great books. =)
I am not sure if you'd feel comfortable reading those books online, but you can do so at
http://safari.oreilly.com/ . After 14 days, you'll have to subscribe if you want to use this online library, but it is well (more than) worth the subscription fee to me.
Good luck!