[11] At age 16, after reading Douglas Adams's The Hitchhiker's Guide to the Galaxy, and Terry Pratchett's Discworld series, Omer decided to try and write a novel.

[13][14] Omer became one of a "handful Israeli authors of science fiction and fantasy," a genre that is rather undeveloped in the small country.

In 2011, Omer joined Shahar Kober and Ziv Botzer and set to write the script for a computer game the three developed together, titled "Misfortune".

[10] Following the positive reviews of Misfortune, Omer set on writing a complex story, to be epic in scale and written as a multiple-part series.

His aim was to write an interactive series, in which readers would be encouraged to visit external links that expand on the novel's universe.

[20][21] For the purpose of the supplemental short films for the book, and in order to stay loyal to the original manuscript, Omer was asked by the publishers to adapt the screenplay elements.

After twenty years of writing, beginning with the publishing of The Geography of the End of the World in 1996, Omer felt constrained by the genre.

[29] "As a teenager, I had entered the world of writing fantasy thinking it would give me freedom, yet over the years it felt rather confining," he later told Yaron London.

[citation needed] While writing Spider's Web, Omer included a side-character named Zoe Bentley, a young FBI profiler.

For the purpose of writing the series Omer read Whoever Fights Monsters by Robert Ressler, as well as Mindhunter: Inside the FBI's Elite Serial Crime Unit by John E.

"[39] Due to the success of the Glenmore Park series, Omer was approached by a literary agent, who facilitated a contract with Thomas & Mercer.

The book, according to Kirkus Reviews, was "An expert ticking-clock suspenser best consumed in one prodigious gulp.”[42] Publishers Weekly noted the series debut as "smart".

In February, 2024, a TV series based on the novel "A Killer's Mind" (Russian: "Внутри убийцы") was released in the VOD streaming service Kinopoisk, which acquired the rights to the film adaptation in 2021.