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Buddhanet contain a lot of meditation related ebooks on the topic which you can read. A good introductory book would be:
Also following questions on the site might be of interest also:
Upvote:1
I have written an answer here which provides free books on the practice of Vipassana medition.
All the books are written by the late Ven. Mahasi Sayadaw. You will find information about the practice of insight meditation, the fundamentals, the technique, development of insight etc. This might be of some help.
Lanka
Upvote:3
Daniel Ingram's "Mastering the Core Teachings of the Buddha" is a superb reference for this. It also explains the differences between different forms of practice, which is useful for deciding when and if to do what. See this answer for more details. And the book itself is freely available from Daniel's site.