Owlcrate is a monthly YA subscription box! It includes 5-6 bookish items, as well as a recent release which almost always has an exclusive cover!
Owlcrate is based in the US, and ships internationally. They only do subscriptions, not single-purchases, but you can cancel at any time.
Fairyloot is a monthly YA subscription box themed around fantasy! The book is always fantasy-themed, as is the book. The book, I believe almost always comes in the UK edition, although it is not a special or exclusive cover.
Fairyloot ships from the UK, and is available internationally.
BookLoot is a monthly YA subscription box. My favorite part about this box is that every month there is a short story written by a community member. So you submit your story idea, and you might get published!
Based in the US, ships worldwide.