Florian's Gate, Priceless Collection Series by Davis Bunn and published by Hendrickson.
When American Jeffrey Sinclair starts a new life in London assisting in a high-end antique shop, he discovers that more than good salesmanship to wealthy customers is required. Alexander Kantor, his enigmatic relative and now employer, has a reputation for acquiring priceless antiques under mysterious circumstances. As Jeffrey learns the business and becomes more involved in searching out valuable pieces across Europe, hediscovers that their source is not the only secret Alexander is hiding.
Jeffrey learns too that Katya Nichols, the woman he is coming to love, also has something to hide. She carefullykeeps her own personal "Iron Curtain" in place, separating herself from his love. Will he be able to break down the barriers and win her trust and heart?
