I'm just baffled that she's made so many mini series of her original books. Like I get it, its fun having a world that you've created and want to explore, but eventually enough is enough and it's going to get stale. Not too mentioned confusing for any potential readers who want to read her books.
Heck Stephanie Meyers recently wrote a new book that has nothing to do with Twilight, and this was the same author who thought it would be a bright idea to write a genderbent version of her first novel to celebrate the 10 year anniversary of twilight.
If Meyers could do it so can Clare.
Meyers is one example, but IMHO the better example of this is the late Terry Pratchett. The Discworld series, overall, rarely got stale because he had a huge cast of characters within the world itself and even some one-shot characters here and there to play with genres, make social commentary, and generally tell a wide variety of stories. Not to mention all the spin-off material, namely more codex-y stuff and maps. But overall? The Discworld series had 41 books to its name by the time of Pterry's passing.
So I don't necessarily see anything wrong with a writer to play in their one sandbox if they want -better than shitting up pre-existing franchises like most of modern Marvel or fan fiction in general-, but Discworld is a good example of how to pull it off properly. Something Cassie should have taken notes on.
However, even he did non-Discworld stuff from time to time, too: the Johnny Maxwell series, the Nome Trilogy, the Long Earth series, and several one-shots in the late 80's.
As for Cassie Clare, she's long overdue for this. She was legendary back in the day, and even people who weren't in the Harry Potter fandom back at its zenith (like me) knew of her name/reputation for one reason or another. And I'm twistedly happy she's still very much a lolcow and proof that even with a failed movie and a TV adaptation that sasses her, a leopard never changes its spots.
She also has some bad beef with a personal lolcow of mine, Aja Romano (who's probably better suited for her own Careercow thread, but she hasn't done anything exceptionally stupid in recent months), so I'm quite familiar with some of Cassie's pre-Mortal Instruments antics (most of which are already covered in this thread).