From Booklist

Twins Oliver and Celia Navel hate adventures. They would rather watch television, but their parents are world-famous explorers. Then their mother goes missing, and the twins accompany their father to Tibet in search of her. There, they encounter a yeti and witches and battle the evil and diminutive explorer, Sir Edmund Titheltorpe-Schmidt III. Fortunately, their vast television watching has given them enough useful ideas to help overcome the obstacles in their way, and readers learn that in a future series installment, the formerly safe and sedentary Navel twins will try to recover the lost library of Alexandria. The many sarcastic and ironic remarks grow somewhat tiresome as the long story wears on, but among the many recent novels that feature kids who fearlessly save the world, however, this one stands out for its funny take on the theme. Grades 5-8. --Todd Morning

Product Description

Eleven-year-old twins Oliver and Celia Navel live on the 4-1/2th floor of the Explorers Club with their father, Dr. Navel. Their mother, Dr. Navel, has been missing for years. So when an explorer shows up with a clue as to where his wife could be, Dr. Navel drags Oliver and Celia to Tibet to find her. Once there, the twins fall out of airplanes, encounter Yetis, travel through waterfalls, and end up in the Demon Fortress of the Warrior King where they - just possibly - might find their mother and save their father from the Poison Witches. Thing is, they would much rather be watching television. And if their trip doesn't work out as planned, the twins could end up as slaves to Sir Edmund Thitheltorpe III, an evil explorer with breath that smells like boiled carrots, who has it in for the whole Navel family.