Cassandra Clare is, quite frankly, my favorite author; so in honor of her excellent books, (which she has many), are five reasons you should take time to read them.
1. Creativity
She has such a wonderful mind full of creativity. Every book- heck, even every paragraph comes up with stuff that I could have never imagined on my own. She creates new ideas and adds new components to old ideas. My favorite series by Clare is The Mortal Instruments because the creativity is just so evident in her work. This is shown in the race she created, shadowhunters, in which she had to write history on them, languages, weaponry, and the like.
She always seem to come up with the most compelling words as well. Words like, 'Parabatai' which seems like a simple word with little meaning, but if you read the books, you would learn that this is a very strong bond. Basically, an unbreakable bond that binds two people together.
2. Plot twists
Clare always has big plot twists from book to book. I literally cannot tell you how many times I went from beyond happy to wanting to scream because of the ways she changes things in her books.
3. Character development
Clare has a way with words, especially when it comes to characters. She not only has the ability to make a person fall in love with specific characters, but also the characters as a whole because they just make up the whole book. If one were left out, it would most likely just feel a little like something was left out. A specific character that you really learn to love (or I did at least):
Alec Lightwood is Jace Wayland's parabatai. He is a good archer, and he is good with his steel, but you won't know what that is until you read the books. He is witty and sassy at times. He is very protective of his younger siblings, and he is a very strong character. This summary of him doesn't do him justice, though. Clare does him justice, and that's why I love her.
4. Cliffhangers
After every book in The Mortal Instruments, there always seems to be some huge cliffhangers...major cliffhangers, actually. I won't spoil these for you, though.
5. Relational development
Clare does a great job with growing relationships (friendships and romantic). Jace and Clary (Clace) come together in an interesting way, but there is not any extreme circumstances that I feel like most books and movies rush into. Clare takes her time, for the most part, and you can see the way they grow together and how they fall in love.
I would rate her books 10/10, definitely read all of them.