Modern Toss, more than any other humour book I've encountered deserves to be No.1.
It already has a small cult following in comic book format this book is a collection of a few of the comic issues. Pages and pages of very crude but very, very funny drawings this book blurs the line between set up and punchline. Featured in the book are Mr. Tourette master signwriter, a man who creates brillantly inappropriate signage for his clients and Dog killer a man who kills dogs in needsless ways. Small concise and very clever, everyone I've shown it too has found it funny.
Supremely offensive this book is the future of humour today.