Seventh-grade sleuths visit their local libraries and unmask a Russian spy ring. The pleasures of watching the young sherlocks once again deduce rings around the grown-ups (using a technique they call TOAST, for "Theory of All Small Things") are just as rich in this trilogy closer as they were in Volume 1. A top-shelf test of courage, friendship, and ingenuity.
– Kirkus, *STARRED*, June 15, 2018
As in Framed! (2016), fast brain- and footwork saves the day at the last moment, but watching Florian wow everyone . . . with Holmes-style connecting of dots along the way is just as satisfying.
A splendid whodunit: cerebral, exhilarating, low in violence, methodical in construction, and occasionally hilarious.
– Kirkus Reviews, Starred review of Vanished!
Mystery buffs and fans of Anthony Horowitz’s “Alex Rider” series are in for a treat. . . . With elements of Alex Rider, James Bond, and Sherlock Holmes stories, this is likely to be popular with mystery and action/adventure fans.
– School Library Journal on Framed!