What is everybody using as their reference/study book for the chemical PE? When I took the PE last year I used the Lindeburg book. It was alright but I was very disappointed in the lack of depth in mass transfer/distillation, chemical engineering thermodynamics, and kinetics. I don't have a need for a new reference manual; I was just curious to see if there were any new good books out there. One of my co-workers has an older version PPI book (I think 5th edition) that seems to be a lot better in the "core" chemical engineering topics than the 6th edition I have.