What we read - should I say no to this book

Would you guys allow her to keep reading the series? My concern isn't this book but where it goes from here.
Books:
Emily Windsnap and the Monster from the Deep - Liz Keller
Cape Refuge - Terri Blackstock
Dead City - James Ponti
Keeper of the Lost Cities - Neverseen - Shannon Messenger
Warriors - Dawn of the Clans - The Blazing Star - Erin Hunter