I have been teaching statistical mechanics and thermodynamics for many years. I have put together all my class notes in a book form. Most of the material is from Huang and Callen. However, some of the foundational parts I have explained in a way that is not quite what you would find in standard texts. Feel free to use the text here:
I have also written a short article in the American Journal of Physics on the role of Quantum Mechanics in the ideal gas law. I address the question of when quantum mechanics is needed in the description of the classical ideal gas. Most statististical mechanics texts do not address this issue. This bothered me for years until I stumbled on the work of ET Jaynes, who I think has the right approach. I tried my best to explain the issue and resolve it. Please email me if you have any comments. The paper is here: