Dowd, Siobhan. 2008. The London Eye Mystery. New York: David Fickling.
Just a quick review - a modern mystery with a twist. Salim, Ted and Kat's teen-aged cousin disappears from a sealed pod on London's famous tourist attraction, The London Eye. Ted, who has a spectrum disorder and a sometimes rocky relationship with his sister, Kat, works with her to solve the mystery that baffles both parents and police. The characters are engaging and believable, particularly Ted, who struggles with his brain's "unique operating system." There is some sibling humor, as when Kat heartily approves of the usually very honest and literal Ted's new found ability to lie, "Go, Ted, Kat whispered. She punched me in the arm so hard I nearly fell down the stairs. "Never thought I'd see the day. You lied.'"
The London Eye Mystery should be popular with 5th - 8th graders.