Anything you can obtain via online as well as by traditional media research can be used for #OSINT. Here's a list of curated resources that you might find useful.
1. INNSIGHT – Leverage Open Source Intelligence (OSINT) for Monitoring & Actionable Intelligence - https://www.innefu.com/Prophecy-case%20study%20_%20Honeytraps.pdf
2. Social Engineering by MindPoint Group - https://assets-global.website-files.com/601959b8cde20c101809c86a/60f972049b28ecf2d873c266_Social-Engineering-Part-Two-OSINT%20(1).pdf
3. USING OSINT DURING NATURAL DISASTERS by Cobwebs Technologies - https://www.cobwebs.com/wp-content/uploads/2020/01/Using-OSINT-During-Natural-Disasters-White-Paper.pdf#OSINT
4. A Practical Guide to the Use of Open-source Intelligence - https://www.americanbar.org/content/dam/aba/directories/roli/raca/roli-raca-osint-guide-2021-final.pdf
5. OSINT NSA surveillance for hipsters by CRoCS - https://crocs.fi.muni.cz/_media/public/openlab/osint.pdf
6. Some resources on valuable concepts of OSINT compiled into one place - https://ln5.sync.com/dl/d23b64020/yeaeawgu-sutx6hwv-zq9ckqak-g6k37qk2
7. Read online collection of OSINT books - https://archive.org/details/opensourceintelligencebooksosint/Counterterrorism%20and%20Open%20Source%20Intelligence%20By%20Springer%20M50I9CFepiYC%28378%29/page/n3/mode/2up
8. Peer-reviewed open access journals. They currently publishes over 100 open access journals covering art and humanities, engineering, medical science, social sciences, biological sciences, physical sciences and agricultural sciences - https://academicjournals.org/
9. Download or read online free e-books legally - https://www.getfreeebooks.com/
10. Another free online library - https://www.gutenberg.org/
It's been 24 days since our first case on Unsolvable CTF was released, but nobody is able to unveil the mystery about Sarah Gray. Will you be the one who solve it?
Check out the case here https://osintforall.in/ctf/case1/1/
and follow the discussion about the case on our discord server https://discord.com/invite/ffU9ef4PxZ

I wish something gets done but I don’t think they’ll let her go with the whole “cancel culture”. What bothered me more is that ADULTS were attacking her as well and threatening whoever leaked it.