On the Kindle app on my phone, I've been reading some of the old "Doc Savage" pulp adventure stories by Kenneth Robeson (a pen name of Lester Dent).
Overall, I've enjoyed the ten novels in the bundle, even if the numbering was all over the place.
Book 1 was followed by book 13, then 14, then back to 5 etc.
Some of the science is a bit ropey - one novel has a t-rex moving like a kangaroo for example - but the stories date from the early/mid 1930s, and our knowledge of science and tech changes on a daily (sometimes hourly) basis.
To a modern audience, much of the stereotypical depictions of characters of another ethnicity is quite offensive, and publishers of today wouldn't go anywhere near them.
But those were the prevailing attitudes of the time, and the stories were intended for an audience of teenage boys.
Also of interest is just how much Seigel and Shuster, and later Bob Kane and Bill Finger cribbed/borrowed/outright stole from Doc for Superman and Batman respectively.