Black Butterfly is the third and final novel in Mark Gatiss's Lucifer Box trilogy, which deals with the exploits of a bisexual British detective and secret agent.

However, he discovers that elderly pillars of the British establishment are meeting unexpected deaths through participation in reckless risk taking and accidents.

He tracks the perpetrators to Istanbul, is assisted by Turkish-Geordie double agent Whitley Bey and meets Afro-Japanese gay agent Kingdom Kum, and also that the aforementioned figures were poisoned by a malignant chemical derived from the eponymous insect.

From there, he travels to Kingston, Jamaica, where he meets the chief culprit behind his misadventures – the progeny of an old enemy, Cassivelaunus Fetch Junior, who is using a "New Scout Movement" to mask his mass poisoning schemes.

This article about a novel of the 2000s with a lesbian, gay, bisexual, or transgender theme is a stub.