The Riddle of Daralis. The Legend of Iski Flare, #3

A giant heart beats in a little chest, or so the riddle starts. Iski Flare is commissioned by a king to find his lost sons. Instead he finds a heartless giant and a prince with a quest. Armed with a new sword and a map he isn't very sure of, Iski joins the prince on his adventure. The only clues they have to follow are wrapped in a riddle that hides more than it tells. Between ravens and bandits, dark ponds and a village with deep root cellars, Iski finds he has more at his fingertips than he ever imagined possible. It may be harder to find a giant's heart than they hoped; and finding it might not be enough.