The Piper On the Mountain (English, Paperback, Ellis Peters)

When Herbert Terrell falls off a mountain in Czechoslovakia, accidental death seems the inevitable verdict. But Terrell’s young step-daughter, Tossa, is not the type to bow to the inevitable. She’d been planning to spend her summer vacation in Europe in any case, so what could be simpler than to persuade her companions to make a minor detour to the scene of the crime.
Not a little bewitched by Tossa’s brown eyes, Dominic Felse is game for a change of plan, though he doesn’t at first suspect her real motive. And he’s certainly not prepared for their innocent touring holiday to become a deadly game of cat and mouse, with Tossa herself the unlikely victim…
A fragment of an English folk song, the plaintive lament of a pipe, an unexpected corpse—these are the clues that the amateur sleuths must solve to discover the riddle of the piper on the mountain.
Source- Goodreads.com
E4