One of the primary themes of Unbound is the exploration of mortality and the afterlife. Shusterman raises important questions about what happens after we die, and whether there is an afterlife or a higher power that governs our existence.

The story begins with Caspian, a teenager who has been clinically dead for four years, but has been sustained in a state of limbo by a mysterious entity known as the “Psychopomp.” Caspian is given the opportunity to return to the world of the living, but only if he agrees to be a “ psychopomp’s apprentice,” tasked with guiding the spirits of the deceased to the afterlife.

The novel also explores the concept of free will and the consequences of one’s actions. Caspian and Lylah’s journey through time allows them to see the ripple effects of their decisions and the impact they have on others.

Unbound by Neal Shusterman is a captivating and thought-provoking novel that explores complex themes and moral dilemmas. The book’s unique blend of science fiction, fantasy, and historical fiction elements makes it a compelling read, and its exploration of mortality, free will, and the human condition makes it a deeply resonant and memorable novel.

Neal Shusterman is a critically acclaimed author of young adult and adult fiction. He has written several novels, including the National Book Award-winning novel Scythe, which was a finalist for the 2017 National Book Award.