Hello, PF! I had been meaning for some time already to start a thread like this, in which we can share our personal, technical (math, physics, engineering) library (as a list or in pictures too), and also recommend your favorite textbooks or handbooks. Here is my collection so far, as a junior year chemical engineering major studying in México. Principles of Physical Chemistry by Maron and Prutton Basic Principles and Calculations in Chemical Engineering by Himmelblau Transport Phenomena by BSL Chemical Reactor Omnibook by Levenspiel Fundamentals of Heat and Mass Transfer by Incropera and Dewitt Transport Processes and Separation Process Principles by Geankoplis Elements of Chemical Reaction Engineering by Fogler My physical chemistry textbook is apparently out of print in the US and other countries, but it's a best seller in México. Personally, I find it better than Castellan's, Levine's or Atkins'. I learned chemical thermodynamics and chemical equilibrium from it. BSL is a classic and needs no introduction. Geankoplis' book is a good reference for transport and my favorite book to learn unit operations (separation processes) from. I like it more than the classic MSH. The Omnibook is fun to read (it is presented as if it were handwritten) but I'm actually learning chemical reaction engineering from Fogler's. Fogler's is actually my favorite chemical engineering textbook right now. I'm also planning on getting an engineering mathematics textbook, and in the near future, a process/plant design textbook. Maybe even a process control book. Then Perry's and Crane TP410 after graduation (if I actually go into process engineering). Recommendations are welcome! Something else I wanted to share is that textbooks here are not as expensive as in other countries. I have bought all my textbooks new and I've spent approximately 2800 pesos (roughly 175 dollars) for my entire collection. Unfortunately, most people down here don't appreciate the value of textbooks.