I've found one good tactic to be the 'reading lists' that some of the arts/science subreddits have in their wikis/sidebars. It's a good way to find solid entry points to a given topic that are at least respected by a good number of people who know what they're talking about.

Examples:

https://www.reddit.com/r/AskHistorians/wiki/books

https://www.reddit.com/r/askscience/wiki/booklist