Many readers seem to be confused about this book. It is not simply a book about gift-giving and the scrapes the protagonist gets himself into the quest to out-do the gifts given by his wife's wealthy friends. To see it as such would be to take it at such face value that you might as well have just picked the book up in the shop, looked at the title and the cover, then put it down again and considered it a job well done.
Of course, any book is open to interpretation, and in mine, this is a book about a man, Phillip, going through a severe mid-life crisis / mental breakdown. It is about the rage of finding that life hasn't turned out the way you thought it would. About the desperation to be better, bigger, more important than one actually is. About flouting society's norms and channeling all this pent up frustration into one single aspect of your life, to the detriment of everything and everyone else. As such, I found the book to be riveting, equally funny and shocking, and ultimately a question of whether Phillip's actions can or should be forgiven - for who of us hasn't, at one time or another, just thought, "Fuck all this shit, I should be the best."?