I am working on a project involving a simulation of the motion of a projectile (in 3D) aimed at a moving target. The way projectile motion is analyzed in most introductory physics books is not accurate enough for this project. I would like to know what other influences on the motion of a projectile, including air resistance and spin, I need to take into account. What is a good book on this subject?
If you have time to read a book, I strongly recommend Richard Feynman Lecture on Physics:
It is everything you want from a book:
In your case, I would focus on the first volume, Mechanics I, particularly from chapter 8.