Free on Amazon UK-
The Red Lacquer Case: A Golden Age Mystery by Patricia Wentworth
Spoiler:
There was a hand pressed against the window, a large hand that looked unnaturally white, the blood driven from it by the pressure of a man’s weight. The light showed the pale fingers—and the still paler palm crossed by a dark, jagged scar.
Young Sally Meredith is distracted from her jam recipes by a visit from uncle Fritzi, who is accompanied by a mysterious red lacquer case containing a deadly secret. A band of unscrupulous international agents are close behind, and when the eccentric uncle disappears into the night the lacquer case is stolen. But Sally is now the only person who knows how to open the case – she is kidnapped, her life in terrible danger.
Meanwhile Bill Armitage, formerly Sally’s fiancé and still in love with her, begins with the aid of Scotland Yard to search for her. The ending of this clever detective story is, unexpected and piquantly, in high contrast to the preceding terrors.
UK
https://www.amazon.co.uk/Red-Lacquer...icia+wentworth
Au
https://www.amazon.com.au/Red-Lacque...icia+wentworth
Can
https://www.amazon.ca/Red-Lacquer-Ca...icia+wentworth