Heft : a novel -by Liz Moore 

also I noticed, I liked 

that Arthur’s first person narration uses ampersands for and:   "I opened the front door &  put the letter in the mailbox & tipped up the happy little red flag."  

and Arthur says  “O”  (not “Oh” like other characters including Kel)  

Charlene calling & saying she had thought of him   ~   “O just like that”   

Arthur says how Yolanda says “Oh no” when listening to story & hears something she does not like.  

does he report it as Oh no   or  O no   when she says it  ?   not sure.    he says “O no”   I think, to her, echoing her,  maybe about her parents cutting her off  ~   

and Kel hears Lindsay’s little sister Margo asking her mother why he is staying there. and she says ~ Because.. he lost his Mama.  like we lost Andy.  (their son/brother).  and Margo says His Mama? Oh no.  

Oh no.