The Einstein Factor — Nancy Falconer

“Come on Liz, you'd be perfect for the experiment!” her friend urged, and she was right. Elizabeth was young, healthy, intelligent, and, most important, pregnant. Liz allows herself to be injected with the Einstein Factor not once but twice producing a son with her first pregnancy and a daughter with the second. When Mark turns eighteen, he is taken into government custody never to be heard from again.

Now twenty years later, Liz's daughter, Sara, is a successful businesswoman in the computer industry. Her latest research project has caught the attention of the same government agency. Hoping to link Sara's project with her brother's, and at the same time correct an error from the past, the agency sends out a couple of agents to kidnap Sara using Mark as the bait. Sara must use her cunning and help from friends to avoid capture and free her brother.