Will clean up post later. Lots of $2.99 Kindle Editions for Scalzi. I’ve read almost all of these and enjoyed them immensely.
Old Man’s War Series:
Old Man’s War
https://www.amazon.com/Old-Mans-W…A618073011
The Ghost Brigades (Old Man’s War Book 2)
https://www.amazon.com/Ghost-Brig…A6180730
The Last Colony (Old Man’s War Book 3)
https://www.amazon.com/Last-Colon…A618073
Zoe’s Tale (Old Man’s War Book 4)
https://www.amazon.com/Zoes-Tale-…A618073011
The Human Division (Old Man’s War Book 5)
https://www.amazon.com/Human-Divi…A6180730
The End of All Things (Old Man’s War Book 6) – don’t be tricked by "The End of All Things #1: The Life of the Mind: The End of All Things – it is just ONE part of the main novel, which was a collection of novellas"
https://www.amazon.com/End-All-Th…A618073011
The Sagan Diary (Old Man’s War)
https://www.amazon.com/Sagan-Diar…A6180730
Redshirts: A Novel with Three Codas (Hugo Award Winner – Best Novel)
https://www.amazon.com/Redshirts-…A618073011
Lock In: A Novel of the Near Future (Lock In Series)
https://www.amazon.com/Lock-Novel…A618073
Fuzzy Nation
https://www.amazon.com/Fuzzy-Nati…A6180730