Here is the list of free PDFs I have attached with my various articles across the website.

1) USMLE step 3

https://www.roots2steth.com/s/HY-1-to-20-cases-notes-Roots2Steth.pdf

https://www.roots2steth.com/s/All-CCS-cases-notes-and-strategies-Roots2Steth.pdf