The 4-Hour Workweek - Tim Ferriss. This book has changed my perspective on the life-work balance. It challenges conventional wisdom on the subject. While at times hard to read due to its scammy tone, it's well worth every minute/penny.
"The 4-Hour Workweek" by Tim Ferris is entertaining, inspiring and has some incredibly unique and valuable ideas. Some ideas may seem unrealistic but I would go into reading the book with an open mind because there is a little nugget of something for everyone.