Sherlock Creator's 2-Part Historical Detective Drama With Rare Perfect Rotten Tomatoes Score Could Last Forever

Though season 1's mysteries stick close to home, with each murder taking place a mere stone's throw from Book's bookshop, Bookish's upcoming sophomore season will be more "ambitious," as the cases spread further across London and to continental Europe (the show was renewed for season 2 before the first episode aired in the UK). In a January 2026 interview with RadioTimes, Gatiss even revealed that he was already writing season 3, though UKTV has not officially greenlit a third outing (yet). Bookish could go far beyond season 3, however, and it deserves to.

Mark Gatiss' Bookish Could Be The Next Great British Detective Drama

Gabriel Book is the ultimate "amateur" detective. His niche interest in antique books and classic literature, and his unique perspective on relationships — Book is a closeted gay man living in London in the 1940s — give him an edge that the police lack. In that way, he's a lot like Christie's Miss Marple and Rian Johnson's more recent creation, Benoit Blanc, seeing details and human connections that the police have missed during their investigation.

He's also incredibly brave. Every time he interacts with Inspector Bliss (Elliot Levey) or Sergeant Morris (Blake Harrison), he's arguably putting his life in danger. Gabriel Book is a worthy leading character, one whose personal background informs his work as a detective. Viewers will be able to return to the show season after season without ever getting bored by him or his eccentric group of friends, family, and fellow sleuths.

Bookish's mystery structure is also the perfect way to approach a long-running series. While there are some ongoing narrative threads, including Book's dynamic with ex-convict and trainee bookseller Jack (Connor Finch), the show's premise doesn't hinge on any major overarching conspiracy or vendetta (as a result, it can never be dragged down by one, either). Gabriel is simply interested in discovering the truth, but it doesn't necessarily have to be his own truth.

The first season consists of three murder cases told across six episodes, and Bookish season 2 will follow the same pattern. Crucially, each mystery can stand on its own. Gabriel's backstory makes the show richer, yet it doesn't overshadow the series' core purpose.

Bookish's Unique Setting Will Help The Show Reinvent Itself Each Season

One of the most compelling things about Bookish is the specific period it's set in. While mid-20th-century London obviously informs Book's experiences as a gay man, it's interesting that Gatiss chose to set the show in 1946, right after World War II, as the city recovered from the Blitz. Many other historical British detective dramas, like early seasons of Foyle's War or The Bletchley Circle, are purposefully set during the war, while those set after, like Grantchester or Father Brown, take place in the '50s and '60s.

In an interview with ScreenRant for Bookish season 1, Gatiss explained that he'd chosen this specific era because it offers so much emotional depth and storytelling opportunities. "It's cast such a huge shadow over everything. I think it's a very rich soil to work with because it has implications for so much. There are so many long-buried secrets." This period was pivotal for Britain's history, and the city's response will make Bookish's cases feel original and unique for a very long time to come.

Every dark alley, every grand hotel, and every rundown apartment may be hiding something. Every neighbor and business is struggling. Every suspect and victim has baggage. As the aftereffects of World War II become increasingly obvious, Bookish can continue to reinvent itself with each new season, creating an interesting parallel as Britain experiences one of the most intense periods of change the country has ever seen. With its compelling lead investigator, accessible premise and structure, and rich historical context, Bookish has the potential to become a long-running and classic detective drama.