SOLVED. YA light-hearted Mystery. Read it around 2019, had something to do with a mailbox, had elements of time travel, book cover was mainly yellow, characters are in school. [s]

[Daph]

im not too sure about this so didnt add it in the title, but i think there was something to do with a dentist or dentist's office

[Ayesha]

When You Reach Me by Rebecca Stead?
and did you read this in another country or language? some editions of this book (not in english) seem to have a yellow cover

[Daph]

Ayesha wrote: "When You Reach Me by Rebecca Stead?
and did you read this in another country or language? some editions of this book (not in english) seem to have a yellow cover"

omg tysm it is this book!! i dont think i read it in another language, maybe confused the colour with another similar book lol