Variable Star - Robert A. Heinlein, Spider Robinson

Variable Star is a chance to read one more Heinlein.  Robert Heinlein is one of the greatest names in science fiction.  Spider Robinson is another.  This book is excellent.  How does an 18 year old musician get a ride on a star ship?  What adventures will he encounter on the voyage?  Will the human race survive?  These are all answered in this book, and in a very entertaining way.  I actually read this one twice.  If there could just be more Heinlein.  Very highly recommended.