NOTE: These are NOT recommendations UNLESS clearly indicated. For more information see About Book Deals.
- A Mathematical Nature Walk by John Adam ($3.99)
- Indigenous Continent: The Epic Contest for North America by Pekka Hamalainen ($2.99)
- Quantum Entanglement by Jed Brody ($1.99)
- Ring of Fire Cascadia by Bobby Akart ($0.99 or available through Kindle Unlimited)
- The Good Years: From 1900 to the First World War by Walter Lord ($2.99)