Website that lets you browse books by tags/keywords?

I'm more used to reading manga than books, and as every manga reader out there knows, there are plenty of websites that let's you combine an insane amount of varied tags to your search. Like for example, mangaupdates has over 3000 tags to choose from and help you find just that one manga you're currently looking for.

But I can't find a similar page for books. At best I can browse by genre, and sub-genre, but what if I want a book with: a male protagonist, subtle romance, fantasy, dragons, magic, etc... well, then I'm out of luck, and I'm forced to browse through endless pages of popular books with mostly female protagonists.

I've tried googling, but have failed miserably, so now I'm turning to you. Please help

 

Goodreads let you do that, maybe not that specific.

 

Hmm... I tried goodreads before posting, and the best I could do was find the genre, Young Adult Fantasy, which doesn't help me much. Is there some other search/browse function on that site I might've missed?

 

Ah, then I don't know, sorry - might be worth making a site like that though.