Personal Anecdote Time:
I once wrote to Jan N. Bremmer, a Dutch #historian , because I was interested in #eleusinianmysteries .
I told him I'm a random layperson but thought his talk (a lecture at a German uni at the time) was great but I can't afford his books (still can't).
After 6 months, I received a massive envelope in the mail from Mr Bremmer - it contained an entire book chapter on the mysteries & a note that he hopes this will help!