Time's Relative by Debbie De Louise

It's the fall of 1998, and librarian Samantha Stewart is looking for a new job. After seeing an ad for a high-paying position at a company called Virtual Software that entails research and travel, Sam investigates the company and learns that its president has gone missing, and that it's currently being run by the vice-president Greg Parsons.

Before Sam makes it to the interview, she's visited by a strange woman who introduces herself as Jane Oldsfield: a time traveler whose mission Greg Parsons is trying to prevent.

Sam ignores the woman and goes on the job interview anyway. Soon, she finds herself involved not only with Greg Parsons, but also Philip Montmart, a chain-smoking detective with a vendetta for his wife's killer, and the time-traveling Oldsfield and her feline accomplice.

Witnessing world events that have yet to happen in her lifetime, including 9/11, Hurricane Sandy, Y2K hysteria and the COVID pandemic, can Samantha figure out Oldsfield's plans?