Updated: Aug 6, 2022
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FairyLoot has posted their theme for September 2022 YA, and it is definitely this book! The box will also include a blanket!
FairyLoot posted an aesthetic montage for their September 2022 YA pick on 15 July 2022 on their IG account…here’s the book I think it is! I’m sure about this one.
So far, this will be in FairyLoot YA for September 2022. Emboss & Spine will be doing a special UK edition as well. It will also be offered as an exclusive edition from Barnes & Noble. You can also get a signed, personalized copy from Mysterious Galaxy. (I highly recommend this bookstore; it is one of the very few I've purchased from that wraps its books well so they don't arrive dinged up.) Additionally, the following UK bookstores are selling signed copies: Waterstones and Forbidden Planet (though this one only comes with a bookplate).
Obiligatory disclaimer: I am not sponsored by or affiliated with any of these boxes. Additionally, a mention on my page does not mean I endorse the box(es), the book(s), the bookshop(s), or the author(s). I am simply providing information.