Lolo and Winkle Break London

The school year has ended but Lolo isn't exactly safe from Winkle's big ideas. She imagines their trip to London being filled with nothing but worry-free fun. Wrong! Winkle finds out about a treasure hunt and talks Lolo and their cousin, Muff into taking part, believing he'll win the ten-thousand-dollar grand prize. Besides, what could go wrong? They're a part of someone else's game. But whose? Winkle disappears, and Lolo and Muff must decipher clues left by the kidnapper to get him back. But things go from bad to worse. To save Winkle, Lolo must muster the courage to face the thing that paralyzes her with fear: heights!