This is first listener submitted book for Luke to review. Variable Star is a novel 51 years in the making. Question: if Heinlein was on a spaceship heading out at 97% of the speed of light for 17 years, and Spider Robinson stayed on Earth to pursue his own writing career, would it have been completed any faster? Also, due to time dilation, Luke managed to talk for 20 minutes about the book.
More info on the SFBRP Wiki
Buy the book on amazon.com (full disclosure, the book costs no more if you use that link to buy the book, but I get a few cents for each sale):