In 1926 Albert Einstein and Leo Szilard patented a new design of refrigerator which avoided the dangers of poisonous refrigerants used in existing designs. However, Einstein's Refrigerator
by Gino Segré isn't about that. Well the book does devote a couple of pages to it, but it's really a more general look at the concept of temperature and together with discussion of various scientific topics related to temperature. It contains plenty of interesting science, but it written in a non-technical way and so is a fairly easy read, even if you've had no previous experience of the subjects dealt with.
The first chapter is entitled 37 - the temperature of our bodies. The second examines the history of temperature and thermodynamics. Other chapters deal with organisms which live in extreme temperatures, the nuclear reactions at the centre of the sun, and with the Earth's climate and global warming. The final chapter looks at quantum theory, and in particular its applications to low temperature physics. If you're looking for a book which goes into one subject in depth then maybe this isn't one for you - it does jump between subjects quite a lot. However, if you're happy with that then you'll find this book an enjoyable read.