Books Like The Tainted Cup: 7 Fantasy and Speculative Mysteries to Read Next

The Tainted Cup works because it refuses to be only one thing. It has a murder mystery, an excellent detective-and-assistant pairing, a deeply strange biological fantasy world, and an empire whose systems feel as dangerous as its monsters.

I gave it 4.5 stars in my review of The Tainted Cup, but this is not a list of books that merely resemble it on the surface. These are for readers chasing a particular part of the experience: the investigation, the unsettling worldbuilding, the institutional rot, or the pleasure of watching a difficult case come apart.

1. A Drop of Corruption by Robert Jackson Bennett

Start here if what you want is more Ana Dolabra and Dinios Kol.

This is the direct continuation of the Ana and Din series, moving the pair into another impossible case: a Treasury officer vanishes from a locked tower, and the disappearance quickly becomes a murder investigation. The same Empire, titan-derived magic, and slightly alarming biological imagination are still in play.

It is the obvious next read because it does not just borrow The Tainted Cup’s ingredients. It continues the detective partnership at the centre of it.

Read this for: the closest possible match, another case for Ana and Din, and more of Bennett’s peculiar imperial fantasy.

2. City of Stairs by Robert Jackson Bennett

If the best part of The Tainted Cup was realising that the mystery was connected to something much larger, try City of Stairs.

A spy arrives in the city of Bulikov to investigate a murder. The case draws her into the city’s brutal history and the unresolved question of its former gods. It is not part of the Ana and Din series, but it has the same Bennett instinct for using an investigation to expose the history and violence built into an empire.

Where The Tainted Cup makes biology and bureaucracy feel ominous, City of Stairs makes theology, occupation, and memory do the work.

Read this for: a murder mystery that keeps widening into a story about power, history, and a damaged city.

3. The Witness for the Dead by Katherine Addison

This is for readers who liked the idea of supernatural detection but want something quieter and more humane.

Thara Celehar can sometimes speak to the recently dead, experiencing their last thoughts and sensations. He uses that gift to settle disputes, determine the intentions of the dead, and find murderers. The result is less of a grand puzzle-box than The Tainted Cup, but the investigative work has real moral weight.

It is a lovely counterpoint to Ana and Din’s sharper, stranger dynamic. The mystery is still there, but the attention is on what it means to serve ordinary people in a world shaped by hierarchy and politics.

Read this for: magical detection, a compassionate investigator, and cases where the human stakes matter as much as the answer.

4. The Justice of Kings by Richard Swan

If you wanted The Tainted Cup to be darker and more concerned with the machinery of law, this is the one.

Sir Konrad Vonvalt is an Emperor’s Justice: detective, judge, and executioner in one person. Alongside his apprentice Helena Sedanka, he investigates the murder of a provincial aristocrat. That inquiry leads toward a conspiracy at the heart of the Empire, with rebellion already pressing at its edges.

The resemblance is not tonal. The Justice of Kings is harsher and more openly violent. But it shares the satisfying structure of a local murder case revealing a much larger institutional sickness.

Read this for: an imperial investigation, political danger, and a more severe version of fantasy’s law-and-order machinery.

5. The Hexologists by Josiah Bancroft

Try this if the appeal was the joy of watching clever investigators handle a magical problem that should not exist.

Iz and Warren Wilby are married magical investigators who solve cases with hexes, cursed objects, and considerable professional expertise. When the king asks them to investigate why he has been baked into a cake, their work uncovers a royal secret with decades of history behind it.

The mystery is lighter on its feet than The Tainted Cup, and the partnership is warmer. But both books understand that a satisfying fantasy mystery needs rules, consequences, and investigators who know more than the reader without becoming boring about it.

Read this for: a magical investigation, an established partner dynamic, and a more playful tonal shift.

6. The 7½ Deaths of Evelyn Hardcastle by Stuart Turton

This is the outlier on the list, because it is not fantasy in the same mode as The Tainted Cup. It belongs here for readers who most enjoyed the construction of the mystery.

A man must identify Evelyn Hardcastle’s killer, but the case comes with a time-turning complication and a locked-room setup. The pleasure is in assembling the rules, working out what each perspective reveals, and seeing how an apparently impossible death might be solved.

Do not pick this up expecting imperial worldbuilding or Ana Dolabra’s dry, unnerving brilliance. Pick it up if you want the feeling of being handed a difficult puzzle and asked to keep up.

Read this for: a high-concept murder mystery, shifting perspectives, and a case built to be solved.

7. The Last Smile in Sunder City by Luke Arnold

For a more noir-shaped version of fantasy detection, meet Fetch Phillips.

Magic has vanished from Sunder City, but the city’s fantastical residents remain. Fetch is a former soldier turned private investigator, solving cases for the magical creatures whose lives he helped ruin. The premise gives the book a worn-down, guilty, street-level mood that is very different from The Tainted Cup’s imperial scale.

Still, both novels know that a detective story gets more interesting when the world itself has scars. In Sunder City, every case comes with the aftermath of a broken magical order.

Read this for: a private investigator, a fantasy city after catastrophe, and a grittier noir mood.

What to read first

If you only choose one, make it A Drop of Corruption. It is the direct next step after The Tainted Cup.

After that, choose based on what stayed with you:

• Pick City of Stairs for Bennett’s broader imperial worldbuilding.

• Pick The Witness for the Dead for a gentler supernatural investigator.

• Pick The Justice of Kings for law, violence, and political conspiracy.

• Pick The Hexologists for a lighter magical partnership.

• Pick The 7½ Deaths of Evelyn Hardcastle for the pure puzzle.

• Pick The Last Smile in Sunder City for fantasy noir.

  
  

The common thread is not that all seven books are “fantasy Sherlock.” It is that each one makes investigation feel native to its world, whether that world runs on dead gods, imperial law, disappearing magic, or a murder that refuses to stay solved.