Now in paperback - Diary of a Wimpy Kid: Dog Days is the fourth mega-selling installment in the hilarious Diary of a Wimpy Kid series.

Greg's mom has a vision of 'family togetherness' that really doesn't sound a whole lot of fun.

But there's a brand-new addition to the Heffley family to contend with and it looks like Greg might be outnumbered. It could be a real dog of a summer . . .

Diary of a Wimpy Kid: Dog Days is the fourth title in the bestselling Diary of a Wimpy Kid series.

Book 1: Diary of a Wimpy Kid

Book 2: Diary of a Wimpy Kid: Rodrick Rules

Book 3: Diary of a Wimpy Kid: The Last Straw

Book 4: Diary of a Wimpy Kid: Dog Days

Book 5: Diary of a Wimpy Kid: The Ugly Truth

Book 6: Diary of a Wimpy Kid: Cabin Fever

Book 7: Diary of a Wimpy Kid: The Third Wheel