Riddle Riddle by Sope Martins

Tamuno has the most annoying brother in the world! Abbey is never quiet and never does what he’s told. But when he disappears into a mysterious hole in the ground one day, Tamuno goes after him without hesitation.

Her journey to rescue Abbey plunges Tamuno into a terrifying kingdom ruled by the ruthless Madam Koi Koi, whom she must best at a game of riddles in order to save her brother.