I enjoyed this anthology of Known Space stories. I especially liked the stories "Wait it out," (set on Pluto), "At the Bottom of a Hole," (Muller discovers the truth behind the failure of a human settlement on Mars) and "The Borderland of Sol" (Julius Forward has a very dangerous weapon). I also like the timeline at the beginning of the book which sets the stories in context and the bibliography at the end.
Readers who like Niven's work may like Shaun Farrell's October 2007 interview with Larry Niven at the Conjecture convention. It aired on Farrell's podcast Adventures in SciFi Publishing: