Need Sci-fi or Fantasy recommendations

I want to get my husband a book for Christmas but am lost in the sci-fi realm. I have a few ideas for fantasy but open to those suggestions. He enjoys sci-fi more hence this post. Thanks in advance for any help!

Some books he’s read and enjoyed

• Old Man’s War series

• Hyperion Cantos series

• Dune

• Foundation series

• The Bloodsworn Saga