I heard Ariana Grande broke her nose but I haven’t seen anything else about any injuries on set

I’m not totally sure because I personally haven’t read either of the books but I do know Wicked strays quite a bit from certain aspects of the book

No problem. The second half of Wicked takes place simultaneously as the wizard of Oz does

Wizard of oz book/movie then Wicked book/movie if doing it in order of how they came out or chronologically Wicked book/Movie then Wizard of Oz book/movie