The market isn't there for the cold hard facts that many of the Theravadin Bestsellers present. As Ben mentioned booksellers have pretty tight margins, so when they stock their 'spirituality
' shelves they're going to ask themselves what's going to sell the more?
It's not going to be your Theravadin texts, which offer a fairly grim picture for all those still infatuated with life.
It's probably gonna be your Mahayana and Pseudo-Buddhist texts, which more often appeal to the romance of the human condition, in a more 'life affirming' way.
PeterB wrote: " With a Foreword By HH The Dalai Lama" is usually a reliable indicator that it need not detain one.
Except of course "What the Buddha Taught" by Bhikkhu Bodhi
"But, Udāyi, let be the past, let be the future, I shall set you forth the Teaching: When there is this this is, with arising of this this arises; when there is not this this is not, with cessation of this this ceases." - Majjhima ii,32
Nanavira Thera's teachings - An existential approach to the Dhamma:http://bit.ly/LDsGHg