Skip to product information
1 of 4

Rose Sandy

The Decrypter and the Pythagoras Clause - Book 5 (PAPERBACK)

The Decrypter and the Pythagoras Clause - Book 5 (PAPERBACK)

Regular price £16.99 GBP
Regular price £16.99 GBP Sale price £16.99 GBP
Sale Sold out
Tax included.

Predicting the future was supposed to be a game, until it became deadly serious.

When a dangerous app begins predicting the future and causing users to fall into mysterious comas, secret government agent Calla Cress is thrust back into the world of secrets and lies. As she races against time to disarm the app, she is confronted by an old enemy who wields powerful technology and threatens to expose a dark part of Calla's past.

With the help of international espionage, Calla must travel from the shores of Turkey to the allure of Havana as she unravels a centuries-old mystery involving a student of Pythagoras and an alarming global government cover-up.

Get ready for a wild ride of non-stop action and suspense with this thriller, perfect for fans of Steve Berry, Scott Mariani, Ernest Dempsey, and Clive Cussler.

The Calla Cress Technothrillers in Order:

- Book 1: The Decrypter: Secret of the Lost Manuscript
- Book 2: The Decrypter and the Mind Hacker
- Book 3: The Decrypter: Digital Eyes Only
- Book 4: The Decrypter: The Storm’s Eye
- Book 5: The Decrypter: The Pythagoras Clause
- Book 6: The Decrypter and the Beale Ciphers
- Book 7: The Decrypter and the Atlantis of the Sands

What readers are saying about The Decrypter Series and Calla Cress.

"Takes you on a ride and refuses to let you off until you reach the very end."

 "A brilliant read! I recommend this to anyone who enjoys mystery, suspense, thrillers or action novels. The detail is astounding! The historical references, location descriptions, references to technology, cryptography....this author really knows her stuff."

"An action-packed adventure, technothriller across several continents like a Jason Bourne or James Bond movie, but with an actual storyline!"

"Brilliantly written. I loved the very descriptive side, which was a good way of visualizing and getting to terms with each new place, as the action takes place in several different countries."

View full details

    •Access to free samples of books (excerpts or first chapters)
    •Entry into giveaways and contests
    •Access to author Q&As and live chats
    •Monthly newsletter with sales, new releases, etc.
    •10% off all books and merchandise
    •1 free ebook per month
    •Early access to new releases (24 hours before general public)


    •All perks from Bronze membership
    •Access to member-only bonus content (deleted scenes,
    character profiles, etc.)
    •20% off all books and merchandise
    •2 free ebooks per month
    •Access to full backlist of ebooks
    •Personalized digital birthday gift from author


    •All perks from Silver membership
    •30% off all books and merchandise
    •Early access to special presales and new releases (48 hours
    before general
    •1 free audiobook per month
    •Exclusive live Q&A with author 1x per year
    •Name listed in "Special Thanks" section of
    author's books

1 of 2

Customer Reviews

Be the first to write a review