Tales of the Frog Princess, book 1: The Frog Princess
E.D. Baker2002

This debut novel follows the adventures of 14-year-old Princess Emeralda and the talking frog she meets one day in a swamp. The frog begs her to give him a kiss so that he will turn back into Prince Eadric, his identity before an evil witch turned him into an amphibian. When the young royal obliges, she, too, is transformed into a frog, and the two leap off in search of the spell-casting witch to ask her to reverse her handiwork.

Titre original : Tales of the Frog Princess, book 1: The Frog Princess (2002)