0439798825 58 p. Cam Jansen #24. After nearly a quarter of a century, Cam Jansen remains a popular character, garnering new fans with each new title. In this newest Cam Jansen mystery, it's a very snowy day outside, so Cam and Eric are running late to computer lab. When they finally arrive, they realize that three computers are missing! There are only two clues - footprints in the snow outside and a locked window. This mystery seems impossible to solve, but with Cam Jansen on the case, the thieves don't stand a chance!