Mark Sullivan

"In late March 1944, as Stalin's forces push into Ukraine, young Emil and Adeline Martel must make a terrible decision: Do they wait for the Soviet bear's intrusion and risk being sent to Siberia? Or do they reluctantly follow the wolves - murderous Nazi officers who have pledged to protect "pure-blood" Germans? The Martels are one of many families of German heritage whose ancestors have farmed in Ukraine for more than a century. But after already...

Two years ago Jack Morgan - the head of the renowned worldwide investigation firm Private - was in charge of security for the World Cup in Bazil. During the championship final, the action nearly spilled from the field into the stands. Fortunately, Jack and his team averted disaster on football's biggest stage. Now he has returned to Rio to secure the Olympics. But before the torch is lit, the threats come fast and furious as Jack discovers that someone...

"Private, the world's most renowned investigation firm, has been commissioned to provide security for the 2012 Olympic games in London. Its agents are the smartest, fastest, and most technologically advanced in the world, and 400 of them have been transferred to London to protect over 10,000 competitors who represent more than 200 countries. The opening ceremony is still hours away when Private investigator and single father of twins, Nigel Steele,...

Plunge into a Kentucky cave system and the ultimate survival game. Using a serpentine underworld for his arena, the author pits escaped convicts against hard-core cavers, NASA scientists, and the most original heroine in years, a teenage Persephone who is perfectly at home in the arteries of perpetual night.

"Thom and Jennifer Harlow are the perfect couple, with three perfect children. They maybe two of the biggest mega movie stars in the world, but they're also great parents, philanthropists and just all-around good people. When they disappear without a word from their ranch, facts are hard to find. They live behind such a high wall of security and image control that even world-renowned Private Investigator Jack Morgan can't get to the truth. But as...

"Anthony Opoka and Florence Okori are coming of age in Uganda in the 1990s. Outstanding students, they believe in being good humans before they are kidnapped and forced into the fanatical Lord's Resistance Army. In a legion of young recruits, no one gets closer than Anthony to powerful messianic warlord Joseph Kony and his darkest secrets. To stay sane as he spirals through chaos, Anthony clings to his childhood lessons about being a good human. Florence's...

Thom and Jennifer Harlow are movie stars with a perfect fan friendly image. When they disappear from their ranch, facts are hard to find. They live behind such a high wall of security and image control that Private Investigator Jack Morgan has trouble finding out what happened to them.