The boxed sets I mentioned are listed down below.

Leigh Bardugo: "Shadow and Bone" trilogy and "Six of Crows" duology.

Jenny Han: "The Summer I Turned Pretty" trilogy.

Ransom Riggs: "Miss Peregrine's Home for Peculiar Children" ("Miss Peregrine's Home for Peculiar Children," "Hollow City," and "Library of Souls.")

Holly Black: "The Folf of the Air" ("The Cruel Prince," "The Wicked King," "The Queen of Nothing.")

Veronica Roth: "Carve the Mark" duology.

Suzanne Collins: "The Hunger Games" trilogy.

JK Rowling: "Harry Potter" series.

Tahereh Mafi: "Shatter Me" series.