If you loved Ryland Grace's resourceful, mission-driven journey to save humanity in Project Hail Mary, you'll be hooked by Mark Watney's desperate struggle to survive on Mars. Both books deliver high-stakes, goal-oriented plots where every decision could mean life or death, and each page is propelled by ingenious problem-solving and a race against time.

If the meticulous, science-based problem solving and realistic space technology of Project Hail Mary fascinated you, you'll be enthralled by Blindsight. Peter Watts crafts a scientifically dense narrative about a crew encountering incomprehensible alien life at the edge of the solar system, raising the same 'hard science' questions about biology, physics, and what it means to be human.

If you were captivated by Grace's ingenious attempts to understand Rocky and the Astrophage in Project Hail Mary, you'll appreciate the intellectual and emotional journey in Contact. Ellie Arroway's quest to decipher an extraterrestrial message and bridge the gap between species offers a similarly profound dive into the challenge—and wonder—of alien contact.

If Ryland Grace's witty narration and the surprising humor in dire circumstances made Project Hail Mary a joy to read, you'll love Redshirts. John Scalzi delivers a meta, laugh-out-loud adventure that pokes fun at sci-fi tropes while still providing a compelling and heartfelt story, blending laughter and tension with aplomb.

If you found hope and inspiration in Project Hail Mary's uplifting tone and vision of cooperation—even across species—you'll be moved by Children of Time. The novel follows humanity and an evolving alien civilization across millennia, ultimately offering a grand, optimistic look at the resilience and ingenuity of life.