In No Brainer, book 18 of the Diary of a Wimpy Kid series from #1 international bestselling author Jeff Kinney, it's up to Greg to save his crumbling school before it's shuttered for good.

“Diary of a Wimpy Kid” has sold more than 275 million copies, according to its publisher, with book number 17 in the series, “ Diper Överlöde,” releasing Oct. 25.

It’s 40-some degrees, but water balloons are being tossed, and a lifeguard is blowing her whistle at guests. “Diary of a Wimpy Kid” author Jeff Kinney is on standby with a 7-foot pool net.

If Jeff Kinney were in a Diary of a Wimpy Kid trivia contest against readers of his book series, the bestselling author confesses he wouldn’t stand a chance. He’d lose outright.

The Diary of a Wimpy Kid series is the big fish in publishing now. With seven of the top 10 hardcovers in 2010, it displaced Twilight as the best-selling juvenile/young-adult series in the U.S.

So here we are with “Diary of a Wimpy Kid,” “Hotel for Dogs” director Thor Freudenthal’s live-action feature film version of the Jeff Kinney books. Kids may love the movie, and even kids ...