One thing struck me. There are powerful women characters in this book.
Not damsels in distress nor secondary background characters. Not pretty eye-candy (well, some are). These are powerful women facing nearly insurmountable challenges.
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(Spoiler)Even the struggles with its antagonists, Amber Miller, and the 1930 Alia Moubayed only to mention a few. Even Tamara's dead mother - Marie Gibbons - plays an intricate role. The 1930's Donita takes on men in one-to-one combat and even Lovecraftian monsters! Veronica faces down a madman! (Spoiler ends)
Yes, there are men in this book's character list, but its main characters are predominantly women.
I am impressed and happily surprised!