Itsy Bitsy Spyder: Evolution Spins a Wilder Web
(By Justine Castellon / for Just Reading Nook)
Fog, bodies, and two exhausted detectives. If you open Itsy Bitsy Spyder: Evolution expecting a straight cop story, Joaquin Larriba has other plans.
The book begins in Mill Valley, California, where the fog never quite lifts. Veteran homicide detective Thomas Krill and his sharp partner, Detective Isabela Ortega, catch a string of strange, almost clinical murders across Marin County. The clues lead somewhere no one wants to go: a hidden WWII-era military sub-base off the Marin wilderness coast, and Project S.P.Y.D.E.R. (Synthetically Programmable Yield Direct Energy Receiver). The program mixes occult spell-tech, transhumanist nanotechnology, genetic experiments, and cosmic manipulation. Yes, all of that. From there, a murder case becomes full cosmic horror. Krill, Ortega, and forensic tech Adam “Dex” face grotesque chimeras, shadowy cabals, and a living fog that haunts the town. Krill has more at stake than most. He is still trying to find his way back to his estranged daughter, Abby, and his ex-wife, Ella.
My one concern is the genre shift. The book starts as gritty noir, and then swerves into speculative horror, secret societies, Nazi occultism, ancient linguistic codes, and reality-bending territory. That is a lot to carry. In the most abstract stretches, the pacing can buckle. It asks a lot of the reader.
When it works, it works well. Larriba blends pulpy horror, dark humor, and real heart. The banter between weary, cynical Krill and Ortega—who is smarter than everyone in the room—is the book’s best feature: funny, unfiltered, and a welcome breath between crime scenes. The side characters land too. Dex is an anthropology-minded forensic tech decoding microscopic runes. Then there is Hercules, a huge, oddly intelligent cat with a cryptic collar tag who guards Krill’s family like it is his job. I loved him.
Larriba’s writing is sensory and vivid. The crime scenes are visceral, and that foul, unnatural fog practically creeps off the page. What kept me invested is how the big transhumanist ideas stay tied to human stakes: faith, a father’s love, a shot at redemption. No matter how strange the story gets, it never loses its heart.
5 out of 5 stars. Itsy Bitsy Spyder: Evolution is a wild, imaginative ride with solid craft, vivid prose, and a detective duo I would follow into another case. Uneven pacing and sudden genre jumps cap it at borderline exceptional, but the energy and originality make it an easy recommendation for speculative fiction fans. Just don’t go in expecting a simple cop story.
Rating: ★★★★★ Exceptional
Itsy Bitsy Spyder Evolution (2026)
Horror
Available in Kindle and Paperback
Read: Nothing is Safe. Everything Bites: J.R. Larriba Talks Itsy Bitsy Spyder Evolution
Justine Castellon is a brand strategist with an innate ability to weave compelling narratives. She seamlessly blends her professional insight with her passion for literature. Her literary works include romantic drama novels—Four Seasons, The Last Snowfall, Gnight Sara / ‘Night Heck, and I Love You, Sunday Sunset. With her ability to tell stories that linger long after the last word, Justine leaves a mark not only in the world of branding but also in the hearts of her readers.
www.justcastellon.com
