Far as I know, book won't be out until Weds.
Sadly no spoilers lol I am trying to guess if Monet's name change will be addressed in HOX/ Why she took that name back. Gabby is Scout now. Monet is gonna use Penance again, which I am kinda happy about because I am tried of "M" myself. It worked for the twins for metaphorical reasons, but Monet didn't need that name.