I've come across dozens of copies Siddhartha in thrift shops and garage sales, bought them all and given them to friends and colleagues to read.

I am surprised nobody mentions Hesse's book of short stories[1] which i highly recommend. They are quite different from his novels and offer a different insight into his world. It's the one book that I am going to to take with me wherever I move.

[0] The Fairy Tales of Herman Hesse https://www.amazon.com/Fairy-Tales-Herman-Hesse/dp/B0000544O...