I second what the others have said re Jay and Xan.
I knew nothing about catching when my son started at the position. I've read several books, and what I noticed (and was surprised to learn) is that there's no one way to do things. Therefore, getting input from more than once source can be very helpful.
Xan has a great website and book (I bought it). Also, follow him on Facebook. Jay has a good DVD (I bought one) which covers the fundamentals very well. Jay also sends out terrific email tips.
Brett Mayne also has a book, but I would spend my money with Xan and Jay first.