What is the best reloading manual for someone interested in reloading 40 S&W and 9MM Para?
While I have several books, I also subscribe to AmmoGuide. It is an online service that has loads for virtually any caliber. It also has some programs for calculating velocity, trajectory and recoil. As ALWAYS, don't take anyone's word for any load. Start light and work up.
Rich
I started with the ABC's of Reloading, Lee's reloading manual most recent edition, and I have downloaded the load data for several powder manufactures. When I am developing a new load or changing any component I will check serveral manuals before starting to load.