Diary of a wimpy kid dog days

It's finally summer vacation and "wimpy kid" Greg Heffley is looking forward to long, air-conditioned days of sitting inside, in the dark, playing video games. His mother, however, wants Greg to enjoy long, sun-filled days of playing outside with other kids. Will anything be able to salvage Greg's vacation? B&W line illustrations accompany the text of this fourth entry in the WIMPY KID series.