"How do you solve a murder when you can only remember yesterday? Imagine a world in which classes are divided not by wealth or religion but by how much each group can remember. Monos, the majority, have only one day's worth of memory; elite Duos have two. In this stratified society, where Monos are excluded from holding high office and demanding jobs, Claire and Mark are a rare mixed marriage. Clare is a conscientious Mono housewife, Mark a novelist-turned-politician Duo on the rise. They are a shining example of a new vision of tolerance and equality-until... A beautiful woman is found dead, her body dumped in England's River Cam. The woman is Mark's mistress, and he is the prime suspect in her murder. The detective investigating the case has secrets of his own. So did the victim. And when both the investigator's and the suspect's memories are constantly erased--how can anyone learn the truth? Told from four different perspectives, that of Mark, Claire, the detective on the case, and the victim--Felicia Yap's staggeringly inventive debut leads us on a race against an ever-resetting clock to find the killer. With the science-fiction world-building of Philip K. Dick and the twisted ingenuity of Memento, Yesterday is a thriller you'll never forget"--,Provided by publisher.

"Imagine a stratified society where classes are divided not by wealth, nor religion, nor property, but instead by memory. Imagine a world where upper class Duos have two days worth of memories and plebeian Monos only one day worth. Imagine, too, that the only way to understand your spouse or your child or your mother is to jog your brain with daily e-diaries. And then imagine someone is murdered. How do you find a killer when all who are involved have their memories constantly reset? Claire and Mark are a surprising mixed-marriage that on the surface seems brilliant. Claire is a conscientious Mono housewife, Mark a novelist-turned-MP Duo on the political rise. But when a woman turns up dead, and she is then revealed to be Mark's mistress, their perfectly constructed life begins to fall apart. Told from four different perspectives--Mark, Claire, the detective on the trail, and the victim--Felicia Yap's staggeringly inventive debut leads us on a race against an ever resetting clock to find the killer. With the addicting cleverness of Before I Go to Sleep, the science fiction world-building of Minority Report and the relatable madness of Gone Girl, Yesterday is a smart, utterly unique, mind-blowing page-turner"--,Provided by publisher.