Ilona Andrews' coming Hidden Legacy book,
Ruby Fever, is up for pre-sale, with a scheduled release date of Aug 23, 2022. It's $7.99 in the US, which is not bad for a brand-new book. But if you live in or visit the UK, it's only £3.99 there (about $5.40, per my favorite Forex website), which is even better!
Ruby Fever is the final book in Catalina's story arc, and at the moment, IA are definitely non-committal on their blog as to whether Arabella will get her own later on...
Kindle UK:
https://www.amazon.co.uk/dp/B09MDB1DLT
Kindle UK/Smile:
https://smile.amazon.co.uk/dp/B09MDB1DLT