Free download of Daniel Ingram's Mastering the Core Teachings of the Buddha.Ebook format is free but if you want a hard copy of the book it is available from Amazon. http://www.interactivebuddha.com/Mastering Adobe Version.pdf If you have read the Visuddhimagga ,the classic 5th century text on Buddhist meditation,you will appreciate this new book as it explains the same teachings in language that is far easier to understand.