FindMyTBR

The Sigma Protocol (Abridged) cover

The Sigma Protocol (Abridged)

Spotify — not confirmed On Apple Books

American investment banker Ben Hartman arrives in Zurich for a ski holiday, the first time he's been back to Switzerland since his twin brother died there in a tragic accident four years earlier.

About The Sigma Protocol (Abridged)

American investment banker Ben Hartman arrives in Zurich for a ski holiday, the first time he's been back to Switzerland since his twin brother died there in a tragic accident four years earlier. But his arrival in Zurich triggers something far more sinister than his brother's fate. When Ben chances upon Jimmy Cavanaugh, an old college friend, Cavanaugh promptly pulls out a gun and tries to kill him. In a matter of minutes, several innocent bystanders are dead - as well as Cavanaugh - and Ben has barely managed to survive. Plunged into an unspeakable nightmare, Hartman suddenly finds himself on the run. Department of Justice field agent Anna Navarro is being stalked around the world by a relentless killer, managing to survive the killer's attacks only by a combination of luck, skill and her own quick wits. These attacks are somehow related to her current assignment: investigating the sudden - and seemingly unrelated - deaths of a number of very old men throughout the world. The only thing that connects them is a file in the CIA archives, over a half-century old, marked with the same puzzling code word: SIGMA. But someone or something is always seemingly one step ahead of her, the survivors are rapidly dwindling, and her own life is in ever increasing danger. Brought together by accident, Ben and Anna soon realize that their only hope of survival lies with each other. Together they race to uncover the diabolical secrets long hidden behind the code word, Sigma. Secrets that threaten everything they think they know about themselves, everything they believed true about their friends and families, and everything they were ever taught about history itself. For behind Sigma lies a vast deception that is finally coming to fruition and the fate and future of the world is in their hands.

Description via Apple Books · source.

Where to listen & where it's available

The Sigma Protocol (Abridged) is available as an audiobook on Apple Books. We haven't confirmed it on Spotify yet — but you can still search there below.

Spotify Not confirmed on Spotify's audiobook catalog yet.
Apple Books Confirmed audiobook Open on Apple Books ▸

Buy or compare copies of The Sigma Protocol (Abridged)

Retailer links open each store's page for this title. As an Amazon Associate, FindMyTBR may earn from qualifying purchases — see our affiliate disclosure.

More by Robert Ludlum

See all Robert Ludlum audiobooks →

The Sigma Protocol (Abridged) — frequently asked

Is The Sigma Protocol (Abridged) on Spotify?
We haven't confirmed The Sigma Protocol (Abridged) on Spotify's audiobook catalog yet. Spotify audiobooks are included with Premium (up to a monthly listening limit) in supported markets.
Is The Sigma Protocol (Abridged) on Apple Books?
Yes — The Sigma Protocol (Abridged) is available as an audiobook on Apple Books.
Who wrote The Sigma Protocol (Abridged)?
The Sigma Protocol (Abridged) is by Robert Ludlum.
Where can I buy the The Sigma Protocol (Abridged) audiobook?
Audible and Amazon both carry audiobooks; use the retailer links on this page to go straight to The Sigma Protocol (Abridged). For print copies, compare Bookshop.org, Barnes & Noble, and Books-A-Million.

FindMyTBR aggregates audiobook availability across Spotify, Apple Books, Audible, and Amazon so you can move your Goodreads TBR to audio. Availability reflects titles we've confirmed; a service with no badge just hasn't been confirmed yet. Covers via Open Library.
Search your whole Goodreads shelf →