This may not be the best forum for this sort of question.
However, a few comments -
(a) HTBJ is a nice pilot level text without too much in the way of mathematical rigour or terror.
However, a well read line pilot will have delved into a few other books in addition.
(b) Hurt's USN NAVWEPS 00-80T-80 warrants a read
(c) AC 23-8/25-7 are essential reading if you want to play with the Design Standards (FAR23/25)
(d) the Airbus books on performance and weight control are good reads and not too heavy
(e) the Boeing Ops Eng training reference is solid going and not really useful to those without a sound grounding in undergraduate level mathematics
(f) Mair and Birdsall's Aircraft Performance is a typically useful basic text without too much frightening mathematics.
(g) Dick Woods' Aviation Safety Programs is basic stuff for pilots