Books like The case of the threatened king by Robert Newman

Andrew Tillett discovers that his friend Sara Wiggins, who failed to return from dancing school, has vanished. He and his mother alert the old friend Inspector Wyatt of Scotland Yard, and together they pursue the case. The investigation deepens when Maria, the daughter of the First Secretary of the Serbian embassy, also disappears. With the young king of Serbia set to visit England, a looming threat to the monarch surfaces. Andrew and Inspector Wyatt traverse London’s crowded streets and, crucially, its subterranean sewers, guided by an experienced tosher, to expose the sinister plot. Though the danger to the king is uncovered, Sara and Maria remain missing. Their disappearance remains a puzzle that Andrew and Sara’s quick wit and detective instincts are poised to unravel, as they navigate London’s hidden corners to bring the truth to light.

First publish date: 1982