Recently in my physics class we covered heat and thermodynamics and I found the subject fascinating; however, given the pace of the course and breadth of material it must cover, I felt that the subject was given a shallow treatment (only covered elementary problems regarding the first law and completely neglected macro and microstates). Consequently, I'm looking for a textbook that will provide a more in depth discussion of heat and thermodynamics and am in the need for suggestions. So, what good textbooks would you recommend for heat and thermodynamics. In case this helps, I'm fairly good with single variable calculus and am learning multivariable calculus. My calculus course also included several chapters on ODE's so I'm alright with them as well. Any suggestions are welcome, thanks!