A suspenseful and adventurous science fiction novel about a conspiracy and betrayal that spans the galaxy. The story begins with an attack on a police patrol boat, resulting in the death of the inspector - general of the unified galaxy, Salina Aloiz. The head of the criminal police, Tyl Theorn, takes over the investigation of the case. Theorn has a personal stake in finding the murderer because he and Salina have been friends since childhood, and their friendship and past memories make this case extraordinarily significant to him.
Meanwhile, on Phobos, a satellite of Creonidas, a girl who had been stolen from a laboratory complex appears. What is the connection between this girl from Phobos and Salina's death? What message is she trying to convey to Theorn? As the investigation progresses, Theorn gradually uncovers a massive conspiracy involving betrayal, crime, and a struggle for power.
The fog of conspiracy, betrayal, and crime awaits the protagonist to be unraveled on the path to the truth. Theorn must sift through complex clues to find answers and confront the forces trying to cover up the truth. This is not only a hunt for the murderer but also a quest for the truth. "The Mark of Cain" will take you into a galaxy full of unknowns and dangers, where you can feel Theorn's struggle between justice and evil.

Yevgenia Kretova (born in 1979) is a Russian best - selling author of young adult fantasy! She is a dynamic prose writer and a science fiction novelist! She has won the Russian "Manuscript of the Year" National Literary Award, the New Children's Book Award, the Children's and Young Adult Prose Competition, the Electronic Character Literary Award, and has been nominated for the Reader's Choice Award and the Russian Detective Award!

Born in Prague, Yevgenia Kretova is the daughter of a military officer and has lived in various cities around the world, such as Tbilisi, Moscow, Blagoveshchensk (my mother is from Blagoveshchensk), Akhalkalaki, and Nerungri, each of which has become a part of her. Before becoming a writer, she worked as a lawyer. Her legal experience and extensive travel have provided her with meticulous thinking and extraordinary imagination! Her writing style excels in depicting alternate universes, the intricate interplay of mysticism and realism, Slavic historical fantasy, detective, and science fiction novels.

In 2021, her work won second place in the "Send Your Story to Space" competition, held in honor of the 60th anniversary of Yuri Gagarin's flight, jointly organized by the Russian Federal Space Agency and LitRes, the largest electronic and audiobook publishing platform in Russia and the CIS countries. Her work was sent to the International Space Station aboard the Progress cargo spacecraft in October 2021! The jury for this competition included internationally renowned science fiction writer Sergey Lukyanenko, Russian cosmonaut Ivan Vagner, and heads of several large publishing houses and magazines in the "Young Adult Books" and science fiction genres! Her works have been recommended by several well - known Russian media outlets, including TASS, Amur Pravda, Russian Gazette, Russian ELLE girl, Glagol, and Letidor! In 2020, Yevgenia Kretova was named one of the ten most popular young adult authors in Russia by Esquire!

**Awards and Honors**
- **"House with a Panoramic Window" won the Russian Electronic Character Literary Award!**
- **The first book in the "Dominators" Slavic fantasy tetralogy won the 2018 Russian "Manuscript of the Year" Award!**
- **"The Other World" won the New Children's Book Award!**
- **The "Space Fleet Navigator" trilogy series was a finalist for the Reader's Choice Award and was nominated for the Russian Detective Award!**
- **The "Salt Curse" audiobook series was named the Best Young Adult Audiobook Series of 2020!**
- **Won second place in the "Send Your Story to Space" competition, held in honor of the 60th anniversary of Yuri Gagarin's flight, jointly organized by the Russian Federal Space Agency and LitRes, and the work was sent to the International Space Station aboard the Progress cargo spacecraft in October 2021!**
- **"The Sturgeon Monastery" was nominated for the 2022 Electronic Character Literary Award!**
- **"The House of Lost Souls" was a finalist for the 2022 Russian Detective Award!**
- **The second book in the "Dominators" Slavic fantasy tetralogy won the 2022 Children's and Young Adult Prose Competition and the "Manuscript of the Year" National Literary Award!**