Charlie Bone And The Beast

Description for CHARLIE BONE AND THE BEAST by Jenny Nimmo:

Charlie faces a dark, new force in CHARLIE BONE AND THE BEAST

Something strange is happening at Moor's Academy. Asa, one of the endowed students who changes into a beast at dusk, has suddenly gone missing, and a new endowed student named Dagbert Endless has enrolled. When Dagbert is seen hanging around with Manfred Bloor, Charlie is sure the pair is up to something wicked. With the help of the Flames, can Charlie and his friends rescue Asa before it's too late?

This is #6 in Children Of The Red King Series.