5 stars for serious designers and builders (who will no doubt have already studies all this) but of little use but inspiration for the rest of us. Not sure who the book is supposed to be for?

Rain water harvesting is very important to avoid water scarcity. In this book so many designs to save rain water.....

A good resource on alternative and attractive methods to deal with runoff. Though appealing, the book has a limited audience.

This is a must-have resource for any landscaper who wants to get ideas on how to reuse rainwater in an eco friendly way. So many pictures and ideas with examples on how to design the concept. I really love this book.