Good books in email/letter/text form?

[ThisMomentIsReal]

When I was in my mid-teens, I enjoyed a series of books by Jaclyn Moriarty that were largely written in the form of letters and notes. I also read a series of books which were instant-message conversations, the Internet girls by Lauren Myracle. I enjoyed these formats, and that they are different to how most books are.
Does anyone have any recommendations of books in these formats that they enjoyed?
Thanks!

The Mitfords Letters between six sisters. I really enjoyed it.

Dracula

Another recommendation for Meet Me At The Museum.

The Guernsey Literary and Potato Peel Pie Society. Really easy to get into and enjoyable.

@MumofSpud

Life On a refrigerator door

This

Really sad but the way it's written is good and meets the objective of this thread

Ella Minnow Pea by Mark Dunn - not only is it in epistolary form but they progressively use fewer and fewer letters of the alphabet!

Attchments by Rainbow Rowell is emails and is quite fun as well.

Notes to my Mother in Law, by Phyllida Law. It’s notes left by the actress Phyllida Law to her elderly deaf mother in law when she came to live with them. It’s a delightful book.

Meet Me At the Museum was serialised on Radio 4 a while back, with Tamsin Greig and Paul Ritter, which was great.

I’d also recommend The Poet X by Elizabeth Acevedo about a 15 yo black girl in the US. The only place she can express herself is freely is in a private notebook where she writes poems. The story is her poems.