I will mention that I had a friend who used the Calvert curriculum for kindergarten, and she found it overwhelming. If that happens with you, don't be afraid to do it your way, cutting things that don't work, adapting things so they fit your son.
As for books, my favorite is The Complete Home Learning Source Book, by Rebecca Rupp. The author takes every conceivable subject and gives an annotated list of dozens of resources, including information on where to buy them. She also includes bits and pieces of her own homeschooling journal, which tell how she approached each subject with her own children. It's a terrific, thick book, and I checked it out from the library so many times that I eventually HAD to buy my own copy!