IMO, the first edition of Thermal Physics, written by Kittel alone is superior to Kittel and Kroemer. Plus, it's super cheap! (~$5) https://www.amazon.com/gp/product/047149030X/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
The second edition expands a few pages of thermo that flows with the rest of the text in the first edition to a very opaque chapter.