Have you read it?
Here's the blurb from Goodreads:
As the final days of summer heat up, so does a sibling showdown over a high-stakes lemonade stand business. Jessie and Evan Treski compete to see who will make $100 first off of their respective lemonade stands. Full of surprisingly accessible and savvy marketing tips for running a stand (or making money at any business) and with clever mathematical visuals woven in, this sensitively characterized novel subtly explores how war can escalate beyond anyone's intent.Great story. Lots of cool math. Amazing Middle Grade contemporary story. To win my autographed copy, you just need to do two things: 1. Comment on this post. 2. Like my author page on Facebook (click on that linky thing on the right hand sidebar).
That's it! You'll be entered, and I'll use random number generator to pick a number from those who comment below (but I will cross check Facebook). Feel free to Tweet, but that won't get you any extra credit.
Contest will run until next Friday, October 14, 2011.