"The Crystal Claw" by William Le Queux is an early 20th-century mystery that begins with a young lawyer's vacation in the Swiss Alps, where he meets the alluring Mrs. Thelma Audley and gets caught up in her complicated life. Thelma's seemingly perfect marriage hides secrets, especially when her husband Stanley suddenly leaves, casting suspicion on who he really is; Rex Yelverton finds himself torn between a growing affection for Thelma and her connection to a secret society, all while navigating a twisting plot that involves her father and a strange pendant known as the "crystal claw," hinting at hidden dangers and old ties.

The crystal claw
By William Le Queux
In the snowy Alps, a vacationing lawyer is drawn into a web of hidden identities, secret societies, and a dangerous romance when a newlywed's mysterious past threatens to consume them all.
Summary
About the AuthorWilliam Tufnell Le Queux was an Anglo-French journalist and writer. He was also a diplomat, a traveller, a flying buff who officiated at the first British air meeting at Doncaster in 1909, and a wireless pioneer who broadcast music from his own station long before radio was generally available; his claims regarding his own abilities and exploits, however, were usually exaggerated. His best-known works are the anti-French and anti-Russian invasion fantasy The Great War in England in 1897 (1894) and the anti-German invasion fantasy The Invasion of 1910 (1906), the latter becoming a bestseller.
William Tufnell Le Queux was an Anglo-French journalist and writer. He was also a diplomat, a traveller, a flying buff who officiated at the first British air meeting at Doncaster in 1909, and a wireless pioneer who broadcast music from his own station long before radio was generally available; his claims regarding his own abilities and exploits, however, were usually exaggerated. His best-known works are the anti-French and anti-Russian invasion fantasy The Great War in England in 1897 (1894) and the anti-German invasion fantasy The Invasion of 1910 (1906), the latter becoming a bestseller.