If you haven't read the series, or isn't sure how to, but is interested, then take a look at this:
Cassandra Clare's website: Link
there is a movie released already. They are currently working on a tv series.
this series has been translated into 34 languages. Here are some of them and their covers: link
dont have money to buy the books? Here are the English versions.
City of Heavenly Fire: Book 6
I highly recommend finding The Shadowhunter's Codex. it will explain everything! I have a link for the free online version, but it is a bit confusing seeing as it has "notes" from the main characters. I recommend finding the actual book.