Read "Dr. Mabuse, der Spieler : $b Roman" by Jacques, Norbert for free. A classic public domain work covering criminals -- fiction, gamblers -- fiction, germany -- fiction. Available in full text from Project Gutenberg.
Criminals -- Fiction
Gamblers -- Fiction
Germany -- Fiction
Hypnotism and crime -- Fiction
Murderers -- Fiction
This book is in the public domain. Free to read and download from Project Gutenberg.