Dragon Slayers' Academy book bundle (Books 4,7,14)

The series follows the adventures of a young medieval peasant boy Wiglaf of Pinwick and his two friends, Erica von Royale and Angus du Pangus, as they are educated in the art of dragon slaying at the boarding school, Dragon Slayers' Academy (DSA), run by Angus' greedy Uncle Mordred. The academy is run under the motto "Goldius est goodius," features three pots of gold above a dead dragon on its back on its crest. Book 4: A Wedding for Wiglaf? Book 7: Wheel of Misfortune Book 14: Double Dragon Trouble