Time-Travel Tales Book 4 – London 1862 by Veronica Sanders

Returning home was supposed to be a break. It became anything but. Fresh off her successes around the world, Deborah was looking forward to a little downtime. Instead, she finds herself at the heart of an interplanetary conspiracy to start a war. Deborah reluctantly dives into the past in search of clues to the long history of the Venusians and Plutonians on Earth. It may prove her undoing, for there are some who want the past to remain secret. Making matters worse is her feelings for the mysterious Jed and Geoffrey, the man she loves. Torn between them, Deborah is about to face her toughest challenges yet.