For my test searches I did "Donnie Darko" and clicked on the first result, and then "Diana Spencer" and tried a few results. Doesn't seem like sources ever load for me. I have a much better experience just going to whatever libgen URL Safari auto-completes for me.
Ah, I figured out what went wrong. Libgen has two different databases, a fiction and non-fiction one, and right now Alexandria only queries Libgen's non-fiction DB. I'll update it to search both databases later this week. Thanks for bringing this to my attention!
It is a really nice app! I have been meaning to get into Mac OS native app development but haven't had the time. Did you implement it in Objective C or Swift?