I second a path with heart,
Didn't want to put too much books in one post though.

Where daniel ingram and TMI focus on meditation practice.
A path with heart goes into the why, how and what of a spiritual path.

As a theravadan monk for 5 years Jack Kornfields book is a less practice orientated in favor of and more philosophical, heartfelt and easyer read.

With Love
Eelco