Really agree with this. If you have time I'd appreciate to hear some of your favourite high-value concise non-fiction books of any discipline...?
a lot of scientific books are like that, for example the art of computer programming.
My other favorites are Traction, Peopleware and Made to Stick. However, they are 230+ pages long. Pretty consise, but I think they could have been shorter.
There aren't many non-fiction books that are 150p and less. Hmmm