Wanted, One Dragon by Beth Webb
Uncle Peter maintains that every cellar should have a dragon. But all that can be found in his cellar is a lot of junk and some large, rainbow-coloured dragon scales. So Louise and Harry set out to find a replacement. Although the quest is far from straightforward, they eventually find themselves with more dragons than they know what to do with... An entertaining and intriguing story with underlying themes about helping those in need and accepting those who have been rejected.