A walled city built to protect and preserve the people who managed to survive a series of great cataclysms, Bulwark was founded on a system where sacrifice is rewarded by the AI that runs the city. Over generations, an elite class has evolved from the descendants of those who gave up the most to found mankind’s last stronghold, called the Sainted. Saint Enita Malovis feels the end of her life and decades of work as a bio-prosthetist approaching. She is determined to preserve her legacy and decides to create a physical being, called Nix, filled with her knowledge and experience. In the midst of her project, a fellow Sainted is brutally murdered and the city AI inexplicably erases the event from its data. Soon, Enita and Nix are drawn into the growing war that could change everything between Bulwark’s hidden underclass and the programs that impose and maintain order.

Eleven-year-old Nedda Papas is obsessed with becoming an astronaut. In 1986 in Easter, a small Florida Space Coast town, her dreams seem almost within reach. But Theo, the scientist father she idolizes, is still reeling from the loss of her newborn brother several years before, and turns to the dangerous dream of extending his living daughter's childhood just a little longer. The result is an invention that alters the fabric of time. Decades later, Nedda has achieved her long-held dream and is traveling aboard the space ship Chawla, part of a small group hoping to colonize a distant planet. But as she floats in zero gravity, she and her crewmates face a serious crisis. Nedda may hold the key to the solution, if she can come to terms with her past and the future that awaits her.

One June day, an old book arrives on Simon Watson's doorstep, sent by an antiquarian bookseller who purchased it on speculation. It is a log from the owner of a traveling carnival in the 1700s, who reports strange and magical things, including the drowning death of a circus mermaid. Since then, generations of "mermaids" in Simon's family have drowned --- always on July 24, which is only weeks away. Could there be a curse on Simon's family? What does it have to do with the book, and can he get to the heart of the mystery in time to save his sister?