Meditate by Swami Muktananda if a relatively theoretical and super-fast read to get through if your looking for not only suggestions in the best, and most basic, ways to meditate (more towards the end), but also for "answers", theory, and an understanding of exactly what it is, how it behaves, and why one uses is. Make a note to yourself, however, this book is based in Kashmiri Shaivism, but very lightly, so anyone and everyone should be able to fully relate to it.