Mats & Enzo

title	ISBN-13	year of publication
How to Bonk at Work	978-1-85375-799-0	2010
How to Poo at Work	978-1-85375-740-2	2009
How to Poo on a Date: The Lovers Guide to Toilet Etiquette	978-1-85375-782-2	2014
How to Poo on Holiday	978-1-85375-811-9	2011