Fortunately the Milk by Neil Gaiman, illustrated by Skottie Young

From chapters.ca:
The name of the book is Fortunately the Milk, and if you know any eight or nine year olds, this book is absolutely perfect. Filled with adventure, aliens, time travel and more, Neil Gaiman’s Fortunately the Milk is a modern day Charlie and the Chocolate Factory, hilarious, wonderfully weird, and guaranteed to turn any child into a voracious reader.