If you loved the laugh-out-loud moments and witty banter as Liam bluffs his way through a space adventure in Cosmic, you'll adore Fortunately, the Milk. Neil Gaiman spins a hilarious, fast-paced tale as a father recounts his absurdly improbable quest to bring milk home, involving time travel, aliens, and pirates. The zany situations and quick one-liners make it a joy for anyone who appreciates a story that doesn’t take itself too seriously.

If Liam's mission to get to space and return safely in Cosmic kept you turning the pages, you'll be hooked by Gratuity Tucci’s quest to find her mother and save the world from bumbling alien invaders in The True Meaning of Smekday. The protagonist’s journey is packed with peril, clever problem-solving, and a strong sense of adventure, making it the perfect follow-up for readers who love a story built around a big goal.

If Liam’s transformation from an overgrown kid to someone who understands responsibility and family tugged at your heart in Cosmic, you’ll love Prez’s journey in Sputnik’s Guide to Life on Earth. As Prez befriends a strange visitor who claims to be an alien, he learns what it truly means to belong and what makes a family. The book balances outrageous adventure with touching moments of growth and self-discovery.

If you enjoyed how Cosmic moves smoothly from one wild situation to the next, you’ll appreciate the clear, linear narrative of The Mysterious Benedict Society. Join Reynie and his friends as they tackle puzzles and overcome challenges, following a mission that unfolds step by step. The direct storytelling style keeps the momentum going, making it easy to get swept up in the adventure.

If the final moments in Cosmic—when Liam reconnects with his dad and reflects on what really matters—left you with a warm, fulfilled feeling, you’ll treasure See You in the Cosmos. Alex’s road trip to launch his golden iPod into space delivers both laughs and tears, culminating in an uplifting ending that celebrates connection, hope, and the wonder of discovery.