Muthiani Nzioki Mutua
Book One out nowThe Skin & Salt Trilogy

Some debtsare paid inskin and salt.

Dark, slow-burn romantic suspense on the Kenyan coast, where the money never balances and the love is always dangerous.

KindlePaperbackFree with Kindle Unlimited18+

The trilogy

Salt, then ash, then gold.

Three books, one coast, and a different price paid in each. Begin with The Devil’s Terms. The spines are drawn to the books’ real page counts.

Book Two

Cover reveal soon

The Devil’s Door

Some loyalties are paid in ash.

AshIn final proof
Book Three

Cover reveal soon

The Devil’s Ledger

Some legacies are paid in gold.

GoldIn final proof

The first line

“The debt collector came to Kyalo’s funeral, and that was how Mwelu learned her brother had died owing the most dangerous man on the coast more than money.”

The Devil’s Terms · Chapter 01 · The Inheritance Read a free sample on Amazon

Before you begin

Read the terms before you sign.

Every reader of The Devil’s Terms agrees to six clauses. Mwelu agreed to worse. Sign below, press the seal, and the coast is yours.

Sign it, then press the seal.

Skin & Salt · Book One

Terms & Conditions of Reading

between the Reader and The Devil’s Terms

  1. The Reader will start it at ten at night and still be reading at four in the morning.
  2. The Reader will fall for the most dangerous man on the coast, and will know better.
  3. The Reader will question every accident.
  4. The Reader will read the money. The money does not lie.
  5. The Reader will not stop before the end of a page, and then the next one.
  6. Some debts are paid in skin and salt. This is one of them.

Fine print: a dark, slow-burn romantic suspense for adult readers. Contains violence, organised crime and death on the page. Intimacy is open-door, without explicit detail. For readers 18 and over. No refunds on lost sleep.

Lines from Book One

Tell me to stop.
Book One · Chapter 09 · The Long Rain

The files

Who you will meet on the coast.

Five people from Book One, as the first chapters introduce them. Spoiler-free

File · MM

Mwelu Mutuku

Forensic accountant

The best at Mwangi and Vance for nine years, then blacklisted in nine days. Her name means light. She was born at night.

File · TA

Taariq Athman

Bahari Holdings

Built his house from a borrowed office over a hardware shop. Salt and cedar, a drink poured and never drunk, and a voice that goes quieter when he is dangerous.

File · WN

Wairimu Njoroge

Runs the house

“I run Bwana Athman’s house.” Eleven years keeping his books. She opens a file on every new face, and she has opened one on Mwelu.

File · KM

Kyalo Mutuku

Her younger brother

Fixed card machines for a living. Laughed easily and paid for the wrong things, gladly. Died owing sixty million shillings at the bottom of the Likoni stairs.

File · SO

Silas Onyango

Asset Recovery

Soft-spoken, a collar gone thin, reading glasses pushed up into grey hair. He has spent six years wanting Taariq.

The coast

Walk the map of Book One.

From the Likoni stairs to the tallest house in Lamu. Choose a place to read what happens there. Not to scale; the coast as the book sees it.

The coastThe Kenyan coast, from Lamu to Tiwi, not to scaleIndian OceanLamuMombasaTiwiTo Nairobi
Mombasa islandMombasa island and its shores, not to scaleTudor CreekKilindini HarbourLikoni ChannelIndian OceanNyaliTudorOld TownOld PortKilindiniLikoni stairs
South of the island

The Likoni stairs

Where Kyalo Mutuku was found on the night of the fourteenth. The police called it an accident.

Book One · Chapter 01 · The Inheritance

Short stories

Before the books, the bonus files.

Four short stories, each told by someone the novels keep at a distance. The first is free tonight. The others go to the reader list first.

Told by Kyalo

The Last Good Day

Before the funeral, there was one last good day.

The afternoon it all began, told by the one person The Devil’s Terms never lets you meet.

Send me the story
Told by Taariq

The Room With No Desk

Before the terms, there was a room that had never once failed.

Taariq Athman, alone at the top of his tower on the night of the funeral.

Get it first
Told by Wairimu

The First Entry

Before the skim, there was one number she chose not to ask about.

Wairimu Njoroge at twenty-five, the year she joined the house.

Get it first
Told by Hamza

The Open Account

Before the forest road, there was one sentence he read three times.

Hamza Salaad, a cleaner with one rule, reads the file on his next name.

Get it first

A note before you begin

What to expect from Book One

Heat
Intimacy

Open-door, without explicit detail

On the page

Violence, organised crime and death

Readers

18 and over

“This is a dark, slow-burn romantic suspense written for adult readers. It contains violence, organised crime, and death on the page. Intimacy is open-door, without explicit detail. For readers 18 and over.” From the copyright page of The Devil’s Terms.

Reader reviews

The ledger of first readers.

The Devil’s Terms reached its first readers in October 2026. Their reviews go into this ledger as they come in, in their own words.

No. 001Reserved for a reader
No. 002Reserved for a reader
No. 003Reserved for a reader

Finished The Devil’s Terms? Your review could be the first entry here.

Get the book

Three ways to pay the debt.

The Devil’s Terms is on Kindle and in paperback worldwide. In Kenya, order a locally printed paperback straight from me.

Kindle eBook

Read it tonight

$2.99USD

  • On any Kindle or the free Kindle app
  • Free to read with Kindle Unlimited
  • Amazon stores worldwide
Buy on Amazon
Paperback in Kenya

From my hands to yours

1,099KES

  • Printed locally on cream paper
  • Free delivery in Nairobi CBD and Westlands
  • Parcel service elsewhere in Kenya, at the parcel fee
  • Pay by M-Pesa · signed on request
Order on WhatsApp

WhatsApp +254 721 612 333

Paperback worldwide

For the shelf

222pages

  • Printed and shipped by Amazon
  • On the same page as the Kindle edition
  • Add it on Goodreads while you wait
Buy the paperback
Muthiani Nzioki Mutua
The authorNairobi

The author

Muthiani Nzioki Mutua

Muthiani Nzioki Mutua writes dark, slow-burn romantic suspense set on the Kenyan coast and beyond, where the money never balances and the love is always dangerous. The Devil’s Terms is his debut novel and the first book of the Skin & Salt Trilogy. He lives in Nairobi.

For two decades his working life ran through boardrooms and site visits, departure lounges and long-haul flights, and dinners that went well past their purpose. Most of it was listening. He learned to read a room: who held the power, what was said, and what was really being agreed underneath. Somewhere along the way he noticed that the most interesting debts are never the ones written down. He writes them down now.

The reader list

Your free story is waiting.

Join the list and The Last Good Day is yours tonight.

About one email a month. Unsubscribe any time.

  • The Last Good DayA free short story from the world of The Devil’s Terms, yours as soon as you confirm your email.
  • First word on Book TwoYou’ll know the day The Devil’s Door arrives, and see its cover before anyone else.
  • Letters from the coastNews, the stories behind the books and the occasional reader-only extra.

For authors

The method behind these books is open to authors.

Idea to Bookshelf takes a book from the first idea, or a draft, to a published paperback and Kindle edition with readers finding it. Twelve stages, each one signed off by you before the next begins.