You run away from the man who's now a dragon as a blast of fire lands right where you were standing. You make it back to the book, as the dragon prepares another firebreath.
You can't carry the book around in this form, but don't stand a chance without it. Yet at the same time, you doubt you're be able to dodge his attacks easily as a human. You need a different spell.
You try the first spell you find that might be useful.
"Shape!" You meow the command word, and in a poof of smoke, you transform into a monkey. There were probaly better animals you could have chosen, but right now you were just trying to get thumbs back. You quickly grab the book, and proceed to run with your monkey legs as another blast of fire lands behind you.
You look through the spellbook looking for a spell to slay the dragon. However, you realize there's a pretty good chance that you're not going succeed on your own. A summoning spell might help, but what real animal could penetrate the dragon's scales.
You decide to try a different spell but similar to your last trick. After you dodge his next firebreath, you point at him and shout 'cub shape' while picturing a dog this time.
A cloud of smoke around him indicates a hit when it clears there is now a puppy, but a second cloud of smoke appears, and out from it was the dragon only this time much smaller. Your idea worked. Him transforming after being made a child animal turning back into a dragon still had him be young. You hope dragons dont breath fire when young.
The now young dragon begins to breath fire once more and..