Books like Another Fine Myth / Myth Conceptions

The life of a young magician's apprentice becomes amusingly complicated when his mentor is assassinated soon after summoning a 'demon.' The assassin fares no better than his target, vaporized by the magician's fireball. The summoned demon remains unscathed, other than for losing his magic. As they say, those who can't do, teach, so he becomes the apprentice's new mentor. These first two books of the Myth Adventures series are better than I remembered. Actually, It's been so long since I first read them that I didn't remember much about them at all. Obviously, I must now put all the others in the series on my TBR list for this year. :-)