We decided that every student who wanted a chance to win our extra copy of the book would submit a small ballot on a piece of scratch paper. The ballot would include a statement as to why they should be the recipient of the Baseball Guide.
The rules were: you could submit only one entry and it had to contain: 1) your name, 2) your classroom number, and 3) a convincing argument for you to receive this book. All entries that included those three items were placed in a basket and at the end of the day one ballot was randomly drawn from the basket.
The persuasive statements were terrific! Each one was unique. But all were compelling. A great "stealth" writing exercise.
I will definitely do this again.