I believe Library Genesis is greatest hidden treasure of the internet. It's a database of books you can search, download, and instantly begin reading. However, it's horribly awful to navigate. So, I build Alexandria, a desktop-based ebook browser powered by Library Genesis. With Alexandria, you can search, download, and open any book within seconds.

Here's a demo where a friend told me about The Courage to be Disliked. Within just ~10 seconds of the recommendation, I can be reading the book.

Download Alexandria via GitHub

It's Mac only, but since it's an Electron app, it shouldn't be hard to build it for Windows or Linux.