I bought the German book “Stille Örtchen für Stubentiger”, which is all about problems with litter pans. In the first place,this book is intended for people who already have problems with their cats and the litter pans, but it is also a good idea to read it before problems even occur to avoid them.

Title: Stille Örtchen für Stubentiger: Unsauberkeit bei Katzen verstehen und Lösungen finden
Author: Christine Hauschild
Publisher: Books on Demand

The author explains what the reasons are why a cat does not use the litter pan anymore. This analysis is very helpful to decide which kind of litter pan you should buy, where to put it, which litter to fill in, and so on. I would recommend the book to anybody who is interested in detail about the reasons for litter pan avoidance and of course also for people who already have the problem.

This book can be purchased at Amazon.