Guardian of the Gauntlet - a children's fantasy by Lenita Sheridan

This book involves a special gauntlet which only works if one has faith in a higher power. When Princess Camari is turned invisible with it by Prince Denir, he is called off to war. She is left in the predicament of being invisible. Two wicked characters are after this gauntlet, a bumbling magician and a bog witch, named Bogwina, who has been enchanted into a pigeon. The gauntlet has been stolen and, in order to get it back, Camari must seek the guidance of Prince Isryk of Bredin. He takes her through the Wetlands of Fremil where there are many nasty creatures. Camari must learn not only how to turn herself visible again, but how to outwit these two wicked characters.