Here are a few suggestions:
Time After Time by Jack Finney. If you like it read the sequel, From Time to Time.
Inside Daisy Clover by Gavin Lambert
Henry and Clara by Thomas Mallon. It's about the couple who went to the theater with President and Mrs. Lincoln that night in April, 1865. Henry and Clara grew up as step-brother and -sister when her widowed father married his widowed mother. The story of their life, how they wound up present when Lincoln was assassinated, and what happened to them after. I had never heard of them, even though I can clearly call to mind the engraving of the assassination, with a man reaching out toward Lincoln as he's being shot. I can tell you that I read the last twenty pages absolutely open-mouthed in astonishment. Mallon has written a number of other good books.
Lost Girls by Andrew Pyper. An attorney from Toronto heads to northern Ontario to defend a school teacher who is on trial for the murder of two students who simply disappeared. Lyrical language. I found myself reading passages out loud to anyone who would hold still.
Replay by Ken Grimwood. In 1988 a man dies of a heart attack, and finds himself back in 1963 as an 18 year old college student. He knows everything that's going to happen for the next twenty-five years. He does everything possible to prevent a heart attack the second time around, but dies again anyway, and finds himself once again an 18 year old. One of my all time favorite novels, and there's been rumors of a possible film for years.
Spencer Quinn has written four books so far about a private detective named Bernie Little and his dog, Chet. The dog narrates. Love them.
Stewart O'Nan also writes wonderful books and doesn't seem to be very well known. He writes about truly ordinary people. The Good Wife is about a woman who is six months pregnant with her first child when her husband who unknown to her has been committing robberies for some time now, has one go horribly wrong and a woman is killed. He's sentenced to twenty-five years to life. She spends the next twenty-five years plus raising their son, managing alone, visiting her husband every chance she can, including when he's transferred to a prison up near the Canadian border of New York State -- she lives not far from Ithaca.
Hope some of this helps. I love finding a writer I like and then reading everything that person has written. There's a wonderful joy and satisfaction in doing that.