I would recommend based on critical acclaim and popular opinion, and that are distinct from Dune:

1. The Martian by Andy Weir: This book is a gripping, scientifically accurate tale of survival on the harsh, unforgiving landscape of Mars. It was a bestseller and has been adapted into a successful film starring Matt Damon.

2. The Three-Body Problem by Liu Cixin: This novel, the first in a trilogy, is a thought-provoking work of hard science fiction that explores themes of alien contact, game theory, and the nature of humanity. It won the Hugo Award for Best Novel in 2015.

3. Ancillary Justice by Ann Leckie: This novel is a space opera that challenges traditional ideas of gender and identity, featuring a unique and complex protagonist who is a sentient ship that has been reduced to a single body. It won the Hugo, Nebula, and Arthur C. Clarke awards.

4. Ready Player One by Ernest Cline: This novel is a fun, fast-paced adventure set in a future world where people spend most of their time in a virtual reality universe called the OASIS. It is filled with references to 1980s pop culture and has been adapted into a successful film directed by Steven Spielberg.

I hope this helps you narrow down your reading choices!
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