Read it twice and will again. If you get the revised edition it has an additional chapter on metta, about twenty pages, at the end.
I also recently picked up his Eight Mindful Steps to Happiness and am looking forward to it.
"The serene and peaceful mind is the true epitome of human achievement."-- Ajahn Chah, Living Dhamma
"To reach beyond fear and danger we must sharpen and widen our vision. We have to pierce through the deceptions that lull us into a comfortable complacency, to take a straight look down into the depths of our existence, without turning away uneasily or running after distractions." -- Bhikkhu Bodhi