Summer Re-read (what's my life's purpose?!)

So I'm re-reading for the third time, Don't Waste Your Life, by John Piper.  I started it today while laying on the beach (getting far too much sun on my already pink back/legs).  It was refreshing to reflect on the question of the meaning/purpose of life while laying and enjoying God's creation.  This is a must read.  It's on the lighter side if you're familiar with Piper.  Most of his books I have to re-read 3 times just to BEGIN to understand them.  This book will challenge spiritually and force its reader to do some self analysis, reflection and repentance.  Bring it on Pipe- I'm ready!!!  Order it from amazon, it's totally cheap, or borrow a copy but READ IT!!! :)