Quite delightful and clever, in the way of Lemony Snicket (A Series of Unfortunate Events), or the Boxcar Children with a dash of Harry Potter (just a dash - there's no actual magic, just fanciful science, and orphan children in a special school). I very much enjoyed the characters and their different approaches to problem-solving (as well as their different attitudes when faced with challenges - I love Kate's dauntless adventuresomeness). I thought the "reveal" about Constance came a bit too late to appreciate - it was more of a joke than part of the plot - but overall this is a well-written, engaging story.

"I can't say for sure, because I have no experience, but - well, is this what family is like? The feeling that everyone's connected, that with one piece missing the whole thing's broken?" -Reynie in a mental letter to Miss Perumal (255)

"You must remember, family is often born of blood, but it doesn't depend on blood. Nor is it exclusive of friendship. Family members can be your best friends, you know. And best friends, whether or not they are related to you, can be your family." -Mr. Benedict to Reynie (257)