Just get the book modern coin magic by Bobo. I myself am not a great coin man because the coin of my country are small, but i can pull off a couple of vanishes. Also learn the classic coin matrix it is a bigger stunner than the complex routines, and also david blaine did it on him show.
But the top three would have to be;
Bobo's Modern Coin Magic
Michael Ammar's Easy to Master Coin Magic DVD.
Or probably the best for ease of learning and the material covered.
David Roth's Expert Coin Magic Made Easy.
Honestly, don't jump into anything extensive... especially not Sick by Ponta the Smith. Don't do that.
I agree with Scott, get Bobo's book. Roth tapes wouldn't be bad, but I highly suggest Modern Coin Magic by Bobo and the accompanying DVD by Ben Salinas of the same na,e.