The guys are being up front and honest with you. You can't go wrong building a library. We love magic books. Perhaps you can even borrow out-of-print books from other magicians, just be very careful with them! A friend of ours just lent us two illusion books. I haven't had a chance to open them up yet, but I'm looking forward to some down time so I can really go through them.
Not only can they teach you the fundamentals, they also get your brain working in a different way-- at least for me. For me it helps to open my mind up to new ideas. The more you learn, the more you will be able to invision new routines. I'm always coming up with ideas at the strangest times. Keep a journal or notebook to help keep track of these ideas. You never know when you might need to go back and reference something.
On a separate note, my daughter premiered her new 30 minute show today at a private party event. It went really well. We were pleased. She had about 16 kids. The majority being 3-4 year olds-- a tough age, with about 4 or 5 8-12 year olds. She kept their attention the entire time and the adults were pleased as well. Can't ask for much more than that.
Just to give you an idea of how long it took her to premiere this new show--- she's been working on it since last Summer. It can be a long process formulating a show, rehearsing it, seeing what works, and what doesn't, and modifying it until you have something you think is appropriate to premiere. Sometimes it can morph into something entirely different than what you planned in the beginning.
Don't get frustrated by the work involved, or the time it takes. You can do it! Just focus on your goals and you will get there.