The story of an immigrant West Indian police officer working as a private detective in 1960s England is being brought to the small screen by Bafta-winning dramatist Tony Marchant.
The writer, whose credits include G arrow's Law, Great Expectations and Iraq War drama The Mark Of Cain, is writing a series inspired by MP Wright's novel Heartman.
The book, which has just been nominated for the Crime Writers Association Steel Dagger award, features detective JT Ellington who leaves his native Barbados for a new life in Bristol.
Marchant is working on the project with World Productions who are behind hit shows including Line Of Duty and The Great Train Robbery.
Wright, a former private investigator who lives in Leicestershire, is working on an separate project to update the classic cold war thriller Callan for TV.
The original ITV show, which featured The Equalizer star Edward Woodward as the secret service assassin of the title, was a huge hit in the late 1960s and early 1970s.
Wright said: "It will be a really up to date story revolving around ISIS and the way illegal immigrants are brought in to the country and what is happening in the Mediterranean at the moment.
"One of the strengths of the original show was what Callan's unit did were fit-ups, murder, blackmail and the question arises if things like that are still going on in 21st century espionage?"