The Case of the Pocket Diary Found in the Snow

"The Case of the Pocket Diary Found in the Snow" by Auguste Groner is a thrilling mystery where a secret service detective named Joseph Muller, aided by an ordinary citizen, Ludwig Amster, races against time to rescue a kidnapped woman. When Amster discovers a package in the snow belonging to Asta Langen, it sets off a high-stakes investigation led by Muller. He soon discovers Asta has been abducted by her step-brother, Egon, who seeks her inheritance, leading Muller to untangle a web of secrets held within a recovered notebook. Driven by justice, Muller uses his sharp intellect and relentless determination to outsmart the cunning Egon and save Asta from a dangerous fate, culminating in a gripping showdown where right triumphs over wrong.