I would just like to endorse all the other 5 star reviews for this product. I am very pleased with mine as it looks great, is genuine leather and seems to be very robust. Everything you want in an item like this.
This book is a well written and well presented introduction to PBL, which discusses what PBL is and why it is successful in delivering enhanced learning. It uses examples and there are templates to use when planning your own PBL lessons.