Rose Sandy books

The Decrypter: Secret of the Lost Manuscript (Calla Cress Techno Thriller Series: Book 1)

ISTF Intelligence Offices, London   Eichel pulled out his passport.  He slid it under the window to the uniformed security guard behind the protective glass.  He had never visited any intelligence services offices before, let alone ISTF.  The only reason he knew it existed was thanks to a chance ...