Friends · S10 E4Sleuthed by @shelfsleuth
Friends · S10 E4 · Joey Tribbiani · Rachel and Joey's apartment
Joey's birthday reading: Love You Forever
Robert Munsch's 1986 picture book ranked fourth on Publishers Weekly's 2001 list of all-time bestselling children's paperbacks, at nearly seven million copies. Joey picked it at random, which is how most of his best decisions get made.
Sources: The One With the Cake, Friends transcript · Here Are All the Books in FRIENDS, Book Riot · Could We BE Any More Literary? The Top Nine Bookish Episodes of Friends, Quirk Books · Every Time A Book Was Referenced On Friends, TVOvermind · Love You Forever by Robert Munsch and Friends, New York Public Library · Love You Forever, Wikipedia