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Eleven-year-old twins Oliver and Celia Navel do not like adventures--in fact, they would have preferred it if they had been left out of this story altogether. But, unfortunately for the twins, they live on the 4-1/2th floor of the Explorers Club with their parents--world-famous adventurers and daredevils. They've been dragged from adventure to adventure their entire lives, when all they've wanted to do is watch television. Now, their mother has gone missing and their father has bet the evil Sir Edmund S. Tithletorpe-Schmidt III that he'll make one of the greatest discoveries in history. And the stakes of his bet? Oliver and Celia will be his servants until the end of high school. Which, when you have only just finished fifth grade, is a long way off. So, the twins must give up their summer vacation to explore Tibet, where they fall out of airplanes, battle Yetis, discover secret caves, fly over waterfalls, and ride one very large yak.

If they can survive their ordeal, decipher the clues, and outwit Sir Edmund, they might just reunite their family, save the world . . . and get cable television.

a fine combination of dry wit and slapstick...the quirky characters and Snicket-esque narrator should ensure a fan following.
— Kirkus Reviews
This is a super funny book, full of great characters and interesting places and unexpected twists. There are a lot of stupid, no-good books out there for kids, but this sure isn’t one of ‘em. I loved it!
— Charlie-Age 10, Los Angeles, CA