Book 'Merlind and the Walpurgis Night'

Merlind and Igor should have left for Walpurgis Night long ago.
But Igor accidentally sits on the broomstick that is supposed to fly them there.
Now Merlind must heal him with magic.
Will the clumsy little witch manage it?
Hopefully, because otherwise they'll have to stay home!
Then Igor suddenly notices a faint tingling between his shoulder blades…