While we're on the subject of meditation books, I can recommend Mindfulness in Plain English[1] and The Heart of Buddhist Meditation.[2]

[1] - https://www.amazon.com/Mindfulness-English-Bhante-Henepola-G...

[2] - http://www.khamkoo.com/uploads/9/0/0/4/9004485/the_heart_of_...