If you like Dragon Slayer's Academy by Kate McMullan

If you like the Dragon Slayer's Academy series by Kate McMullan, here are some other dragon/fantasy books you may enjoy:

Three Tales of my Father's Dragon by Ruth Stiles Gannett.
My Father's Dragon -- Elmer and the Dragon -- The Dragons of Blueland.
A compilation of three tales which relate the fantastic adventures of
Elmer Elevator and a baby flying dragon named Boris.

The Dragon of Doom by Bruce Coville.
Life in the village of Pigbone is boring until an aspiring magician and his talking toad come to town and ask Edward to help them slay the Dragon of Doom.

Farmer Giles of Ham: The Rise And Wonderful Adventures Of Farmer Giles,Lord of Tame, Count of Worminghall, and King of the Little Kingdom by J.R.R. Tolkien.
Farmer Giles, his mare, and his talking dog go into the
valley of the Thames to fight the dragon Chrysophylax.

The Chronicles of Narnia by C.S. Lewis.
A classic series of fantasy books about the land beyond the wardrobe. Four brothers and sisters enter a fantasy land where they help Aslan, the lion, triumph in battle with the White Witch.