Three 2020 releases with Kindle versions priced at $3.99 on both Amazon.com and Amazon.ca:
The Kindle version of Sami Tamimi's Falastin (eG-friendly Amazon.com link)
The Kindle version of 100 Cookies (eG-friendly Amazon.com link) by Sarah Kieffer of The Vanilla Bean Baking Blog
The Kindle version of Bryant Terry's Vegetable Kingdom: The Abundant World of Vegan Recipes (eG-friendly Amazon.com link)
All are listed as "Deal of the Day" not sure what that means for the longevity of those prices. Edited to strike out the books that are no longer bargain priced.
Apologies if these have been previously posted, I didn't search through the thread.