Late at night, a doctor burns to death inside the closed forensic psychiatric institution Helix. The interrogations with staff and inmates are complicated due to patient confidentiality and psychotic illnesses. After another death in the same ward, Saga Bauer accepts a top-secret assignment. She is placed as a patient among the most dangerous perpetrators in Sweden. Joona Linna is Saga Bauer’s only contact on the outside. The Queen hiding in the ward turns out to have a court of subjects – and she leaves victims behind at a faster rate than any serial killer has ever done before.

Medusa is the eleventh book in the Joona Linna series.

Seth Manteus is a Swedish actor currently studying at the renowned Malmö Theatre Academy. Highly ambitious and driven, he approaches his work with curiosity, commitment and a strong desire to continuously develop his craft. With a natural screen presence and a strong sensitivity to character, Manteus brings an openness and intensity to his performances.

He made his breakthrough as the young Hugo in the SkyShowtime drama series The Trio (2026), based on Johanna Hedman’s acclaimed novel. The series received fantastic reviews, with critics praising its performances, storytelling and emotional depth. The Trio marked Manteus’ first major TV role, acting alongside Felix Sandman, Rebecka Harper and August Wittgenstein.

Manteus is also a trained musical theatre performer, having studied at Musikteaterskolan in Bjärnum, where he received extensive training in musical theatre, with a particular focus on high-level jazz dance, ballet and singing. His musical background also includes guitar, piano and drums.

Moa Herngren’s just published The Fallout comes in at No. 4 on the official hardcover bestseller list of August in Sweden. Martin Widmark’s latest JerryMaya title, The Kidnapping Mystery, grabs the No. 2 spot on the children’s fiction list.

Machines are getting smarter while humans seem to have succumbed to brain rot. Tasks that once required human brainpower are increasingly being taken over by AI. But what happens to our brains when we stop making an effort?

In an age of artificial intelligence and human stupidity, we need awareness, knowledge, and strategies. The Brain Rot Fix is about preserving our curiosity, developing our thinking, and continuing to learn throughout our lives—to cultivate the abilities that give humans an advantage in our increasingly automated world.