Diamond Brothers Books in Order
Part ofAnthony Horowitz Books in OrderSee all the Diamond Brothers books by Anthony Horowitz in order, with quick case summaries, series background, and a tip for where new readers should start.
Last updated: January 13, 2026
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Publication Order
10 books
Where Seagulls Dare
by Anthony Horowitz
2022
Nick and Tim Diamond head to a seaside town for what sounds like a bizarre missing-person case, and quickly learn the locals are hiding more than they admit. The mystery turns into a comic chase as the brothers try to work out what really happened.
The Double Eagle Has Landed
by Anthony Horowitz
2011
A suspenseful adventure built around a cryptic message: “the double eagle has landed.” As the trail unfolds, a simple mystery turns into a dangerous chase through secrets and deception, where every clue changes what the characters think they’re facing.
Two of Diamonds
by Anthony Horowitz
2009
An omnibus that brings together two Diamond brothers mysteries in one volume. Nick and Tim Diamond handle a pair of fast cases full of suspects, slapstick mishaps, and real clues, making it an easy way to dip into the series.
The Greek Who Stole Christmas
by Anthony Horowitz
2007
It’s almost Christmas, and the Diamond brothers get a case that mixes holiday cheer with criminal chaos. When something important goes missing, Tim follows the clues while Nick stumbles into danger, and the brothers race to solve it before the day arrives.
The French Confection
by Anthony Horowitz
2003
Tim and Nick Diamond get pulled into a case with French connections, missing items, and people who don’t want questions asked. The mystery unfolds at a sprint, with Tim chasing evidence and Nick stumbling into trouble at every turn.
The Blurred Man
by Anthony Horowitz
2003
Tim and Nick Diamond take on a case that starts with a strange client and a mystery that won’t stay still. As clues pile up and suspects slip away, the brothers chase answers through a string of mishaps, with Tim doing the detecting and Nick doing the crashing.
I Know What You Did Last Wednesday
by Anthony Horowitz
2003
A Diamond brothers mystery that begins with a threat tied to a very specific secret. Tim follows the clues while Nick blunders into danger, and the investigation turns into a comic race to expose the blackmailer before the next “reminder” turns nastier.
South by Southeast
by Anthony Horowitz
1991
A Diamond brothers case that starts as an easy job and quickly turns into a mess of scams, missing people, and criminals who think Nick Diamond is in the way. Tim keeps the investigation on track while Nick finds new ways to get into trouble.
Public Enemy Number Two
by Anthony Horowitz
1987
Nick and Tim Diamond land a new client and find themselves in the path of criminals who don’t like questions. The case turns into a scramble of disguises, chases, and wrong turns, with Tim trying to keep the clues straight and Nick causing the chaos.
The Falcon's Malteser
by Anthony Horowitz
1986
Private detective Nick Diamond takes a simple job and immediately regrets it. With his younger brother Tim dragged along, the brothers chase a mysterious package, dodge gangsters, and stumble through a noir-style mystery that keeps getting worse, and funnier.
Series background & context
The Diamond Brothers books are mysteries, but they’re built like a comedy double act. Nick Diamond calls himself a private detective, even though he’s usually broke, behind on rent, and making it up as he goes. Tim Diamond is his much younger brother, and the one person in the office who can usually see the obvious clue.
Most of the stories start with a client walking through the door with a simple problem. Then the case takes a sharp turn into car chases, dubious gangsters, mistaken identities, and the sort of bad luck that seems to follow Nick like a shadow. The tone is light, quick, and very aware that detectives do not look glamorous when they’re living on cheap snacks and optimism.
It’s funny, but the mysteries still play fair.
The books are mostly set in and around London, with occasional detours when a case drags the brothers out of town. The Falcon's Malteser sets the template: a noir-style setup, plenty of jokes, and a mystery that gets more dangerous the closer the brothers get to the truth. Later cases like Public Enemy Number Two and South by Southeast keep escalating the chaos, while shorter books lean into a single sharp hook and a fast finish.
The heart of the series is the relationship between the brothers. Nick is impulsive, overconfident, and oddly lovable. Tim is sharper, more cautious, and sometimes the only adult in the room, even though he’s the kid. Their bickering is part of the fun, but there’s also real loyalty underneath it, especially when trouble shows up at the office door.
Nick Diamond is not a role model.
Horowitz writes these with quick chapters and punchline timing, so they work well for new or reluctant readers. You get the satisfaction of a mystery, but you also get the feeling that anything could happen in the next scene, including a pratfall. Tim still has to do the homework.
If you’re choosing where to begin, start with The Falcon's Malteser and go in order. Some books are full-length novels, and others are shorter cases like I Know What You Did Last Wednesday, The French Confection, and Where Seagulls Dare, which makes the series easy to dip into. Either way, expect a mystery you can follow, jokes you can quote, and a pair of detectives who somehow survive their own plans.
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