Tara's writing style is strikingly similar to Danziger's Amber Brown books, and Elizabeth's writing style is strikingly similar to Martin's Baby-sitters Club books.
The Scarlet Letter | Dear John letter | White-letter Hairstreak | Letter-winged Kite | Letter of Majesty | National Letter of Intent | letter | No Longer at Ease | National Association of Letter Carriers | Chi (letter) | Beta (letter) | Barons' Letter, 1301 | The World Is a Beautiful Place & I Am No Longer Afraid to Die | The Johns Hopkins News-Letter | Strawberry Letter 23 | South Park: Bigger, Longer & Uncut | My Letter to George | Moe Letter Blues | Loudermill letter | Longer | letter (message) | Letter from an Unknown Woman | Letter bomb | Hazing in Greek letter organizations | Habbush letter | Einstein–Szilárd letter | Delta (letter) | Dead Letter Circus | Chrysler 300 letter series | Canuck letter |
Novels written using or inspired by this type of letter game include Sorcery and Cecelia or The Enchanted Chocolate Pot, The Grand Tour or The Purloined Coronation Regalia, and The Mislaid Magician or Ten Years After, all three by Patricia Wrede and Caroline Stevermer; Freedom and Necessity, by Steven Brust and Emma Bull; and the children's books P.S. Longer Letter Later and Snail Mail No More by Paula Danziger and Ann M. Martin.