Below are some good dystopian novels with similar elements of action, suspense, and a little romance.
Across the Universe by Beth Revis - 2011. When 17-year-old Amy joins her parents as frozen cargo on a spaceship, she expects to be thawed 300 years later upon arrival at a new planet. However, her world turns upside down when she is awakened fifty years too early and finds herself embroiled in the mystery surrounding the attempted murders of frozen passengers. Her life endangered by Eldest, the tyrannical leader of the ship's maintenance population, she turns to her only ally: Elder, the young man destined to take Eldest's place as leader. As they solve the mystery together, romance blossoms between Amy and Elder, complicating an already complex situation.
Blood Red Road (Dustlands Series) by Moira Young – 2012. In a post-apocalyptic future, 18-year-old Saba’s twin brother is stolen by black-clad riders. When tough-as-nails Saba launches a relentless search to recover him, she must fight for her life in gladiator cages, overcome enemies both creature and human, and learn to trust others for the first time. And try as she might, she can’t help but fall for the charming scoundrel Jack, who just may understand her more than she knows.
The Shore of Monsters by David J. Nix – 2011. Five generations earlier, a horde of monsters nearly obliterated humanity. All males are dead or ruined by a monster plague; words like 'father' and 'romance' have lost meaning. When teenager Sky joins an expedition to the shore that falls apart, she must survive amongst the monsters that roam the ruins. She gets unexpected help from a very surprising source. Mystery, action, and romance follow!
Delirium by Lauren Oliver – 2011. In the tightly controlled society of a future America, love is forbidden, classified as ‘deliria’ by authorities. Three months before her 18th birthday and a mandatory procedure to ‘cure’ her deliria, Lena meets Alex, who sends her heart aflutter. As love blossoms between the two, Lena questions what she has always been told about love, and begins to consider the unthinkable: not submitting to the cure, and choosing deliria instead. Beautifully written, but a little slow.
The Forest of Hands and Teeth by Carrie Ryan – 2010. Seven generations have passed since the Return, a plague that reanimates dead humans into creatures that feed on the living. Teenager Mary lives inside one of the last enclaves of uninfected, protected by a chain link fence that surrounds her village. When the fence is breached, Mary flees the village with a small band of survivors. Their flight toward an uncertain salvation is both harrowing and revealing, as they try to determine if they are humanity’s last hope.
How I Live Now by Meg Rosoff – 2006. Fascinating novel about the outbreak of a 21st century world war as seen through the eyes of Daisy, a 15 year old American staying with her cousins on a remote England farm. At first utopian, the kid's existence degenerates into horror as the war encroaches on the farm. Through the several month period covered by the story, Daisy grows from a self-centered girl into a determined survivor. This book will leave a mark on the reader for years to come.
Maze Runner by James Dashner - 2009. When Thomas arrives in the Glade, he remembers nothing but his name, just like the dozens of other teen boys who arrived before him. The Glade, which is surrounded by an impenetrable maze, is closed at night to guard against the creatures that roam the darkness, but open for exploration during the day. Getting caught outside at night is certain death. As the boys try to unravel the mystery of their existence, a complication occurs: the first girl arrives in the Glade. More importantly, she has a connection with Thomas and a message that may determine the fate of all the Glade's inhabitants.
Shipbreaker by Paolo Bacigalupi – 2010. In a near future of rising seas, no oil, and extreme poverty, a teenager works as a shipbreaker - one who salvages rusting ships for parts. When he finds a wrecked super-yacht after a storm, he thinks his days of poverty are over. However, he gets swept into an adventure when bad people come for the one survivor of the wreck - a rich, beautiful girl who owns the vessel.
The Uglies Trilogy by Scott Westerfield – 2005. In a future society, a mandatory operation at age 16 wipes out physical differences, turning "Uglies" into "Pretties". The Pretties are allowed freedom to play, while the Uglies jealously await their turn. Ugly Tally has gotten into trouble that may forfeit her operation. The menacing government offers her a way out: find a group of rebel Uglies, infiltrate, and betray them. Tally agrees, but upon finding the rebels comes to understand the terrible price of becoming pretty.