Can you recommend some 2019 best science fiction books?

Sure. 'Sea of Tranquility' by Emily St. John Mandel is a great 2023 science fiction book. It weaves together different timelines in a very skillful way. There's also 'The Kaiju Preservation Society' by John Scalzi which has a really fun concept of protecting kaiju (giant monsters).

Sure. 'The Vanished Birds' by Simon Jimenez is a great 2020 science fiction book. It has a beautiful and poignant story that spans different worlds and time periods.

Sure. 'Galactic Empires: Rebirth' is a great one. It shows the rise and fall and then the rebirth of a galactic empire. It has a lot of political intrigue and space battles. Another good book is 'The Nano World' which is set in a future where nanotechnology has transformed everything from medicine to warfare.

Yes. 'Record of a Spaceborn Few' by Becky Chambers is excellent. It's a story about the lives of ordinary people in a space - faring civilization. It's really heartwarming as it focuses on the day - to - day experiences, relationships, and the sense of community among these people in space.

Yes. 'A Desolation Called Peace' by Arkady Martine is one of the best. It's a follow - up to 'A Memory Called Empire' and continues to explore a richly - imagined alien culture and political intrigue. Also, 'The Galaxy, and the Ground Within' by Becky Chambers is excellent. It focuses on different species being stuck together and how they interact and learn from each other.

Yes, 'The Memory Librarian: And Other Stories of Dirty Computer' by Janelle Monáe et al. is a really interesting collection. It explores themes of identity, technology, and resistance in a science - fiction setting. It's also a very creative and thought - provoking work.

Sure. 'Recursion' by Blake Crouch is one of them. It has an amazing plot about memory and time. Another good one is 'A Memory Called Empire' by Arkady Martine. It has great world - building and political intrigue.

Sure. 'Wool' by Hugh Howey is a great 2013 science fiction book. It's about a post - apocalyptic world where people live in a silo underground. The mystery and the society within the silo are really interesting.

Sure. 'A Canticle for Leibowitz' is a great one. It follows the story of a post - apocalyptic world where a Catholic monastery preserves knowledge. 'Hyperion' by Dan Simmons is also very good. It has a complex narrative structure and a fascinating universe with different sentient species. And 'Starship Troopers' by Robert A. Heinlein is a well - known sci - fi book that explores military life in a future where humans fight against alien bugs.

Sure. 'Ender's Game' by Orson Scott Card is a great one. It tells the story of a young boy, Ender, who is trained to fight in a future war against an alien race. The book explores themes of leadership, morality, and the nature of the enemy.