Have you heard the podcast Most Notorious? It only covers historical true crime stories. The host interviews authors and he makes sure to include lesser known cases. You can find it on Stitcher or Apple. There is also a writer named Jason Lucky Morrow who writes a series of Kindle books focused only on 19th and early 20th century cases. Here's his first collection. You'll love it: https://www.amazon.com/Famous-Crimes-World-Forgot-Obscurity-ebook/dp/B00R8U35GQ
This is an anthology of lesser-known true crime stories. None are supernatural but there's enough variety to keep you interested.
https://www.amazon.com/gp/product/B00R8U35GQ/ref=dbs_a_def_awm_bibl_vppi_i2
Here are all the local Amazon links I could find:
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