Similar to Eats, Shoots & Leaves, this volume makes the process of learning grammar more enjoyable by framing lessons within fanciful little stories. That said, it does get repetitive after a bit, and might serve better as a reference. Reading it over many days might also help break up the problem/solution structure of the book.
Published under writing, june-casagrande
Amusing look into one person's life long relationship with grammar. It's fun, short, and perhaps you'll make sense of some grammar along the way. Although, I think it's just made me re-read everything I write like ten times.