Officer Kate St Clare has returned to London from the family home in Devonshire when the G7 and the EU impose a total ban on all Russian diamonds -- at a potential loss of 4.3 billion dollars to the Moscovite republic.

 

St Claire is summoned to Thames House to partner with Agent Farraday in a joint op with MI6 that will pull them into the high tech world of lab produced diamonds . . . where a 10-carat stone can be created in a CVD machine.

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Swiftly paced, with razor-sharp characterization, the Ten Carat action moves from Red Square to the City of St Petersburg, and from Belravia to the stormy Highlands of Scotland, racing against the clock to retrieve a female hostage caught up in the scheme to sidestep the ban.