Books with title Oliver Moon's Summer Howliday

Enter the magical world of Oliver Moon, Junior Wizard, in these fun illustrated adventures full of gruesome details and extraordinary characters. Oliver is really looking forward to his summer holiday in the haunted forest. He can't wait to go ghost hunting and he'd love to meet the werewolves that are rumoured to live there. But his parents are not happy about the noisy howling that goes on in the forest at night. Could Oliver's hairy new friend, Wilf, have anything to do with it?