A book that takes place in one day

[Ramona]

Some ideas:

Intensity by Dean Koontz
Molly Fox’s Birthday by Deirdre Madden
Billy Lynn’s Long Halftime Walk by Ben Fountain
The Statistical Probability of Love at First Sight by Jennifer E. Smith
Saturday by Ian McEwan
Mrs. Dalloway by Virginia Woolf
After Dark by Haruki Murakami: