What hides under a bed, eats chocolate ripple cake and sends
letters in silver envelopes? Whatever it is it’s making strange and
ominous noises and Henrietta is determined to trap it. To her
surprise, the culprit is a mind reading, love-sick and very bossy
fairy called Mabel May Hissop . . . Mabel has a letter for
Henrietta - it's an invitation to an magical ball, where fireflies
and fairies dance the night away. Fans of Henrietta’s previous
adventures will love this enchanting new adventure.