Kindle US is having a $4.99 and under deal on "Top history reads" through 11:59pm PDT on 02/21/21. I spotted one book I haven't read and want to:
Madame Fourcade's Secret War: The Daring Young Woman Who Led France's Largest Spy Network Against Hitler. Also several books I have read and enjoyed:
Notorious RBG: The Life and Times of Ruth Bader Ginsburg,
Code Girls: The Untold Story of the American Women Code Breakers of World War II, and (YMMV - your enjoyment will probably depend on your politics)
Shade: A Tale of Two Presidents, by Pete Souza. And of course, who would want to miss (probably me

, although it has 4.5/5.0 stars at Amazon on more than 180 rankings):
Sex with Presidents: The Ins and Outs of Love and Lust in the White House by Eleanor Herman. There are a bunch of others, and many are less than the $4.99 max, so check it out if you like history:
https://www.amazon.com/s/ref=s9_acsd..._i=11552285011