Quantum Curators and the Fabergé Egg by Eva St. John

Death or Glory – just another day in the office. When a priceless Fabergé egg comes to light everyone is after it. Neith Salah is a quantum curator. It's her mission to get the egg; she doesn’t know what it looks like, or where it is, but she knows it’s not on her earth. Julius Strathclyde lives on a parallel earth. He's a Cambridge professor and an archivist; he loves tea, research and a quiet life. It's a pity then, that he's the only person alive who knows where the egg is. She has guns and attitude, he has a fountain pen. Together they are going to have to race against time to save the egg, before a hidden enemy gets there first.