Charlie Bone and the Shadow (Children of the Red King #7)

In Book 7 of Jenny Nimmo's bestselling series, Charlie Bone finds himself ensnared in a magical painting, facing the vengeful Count Harken, who is intent on targeting Charlie's family. As he embarks on a perilous journey to the ominous land of Badlock to rescue his kidnapped ancestor, Charlie is joined by his best friend's loyal dog, Runner Bean. However, when Runner Bean becomes trapped, Charlie must rely on his friends to confront an army of trolls and succeed in their mission before time runs out.