Trying to find a book, but can't remember the author or title. The setting is an Earth where time itself has started to unravel and multiple time periods appear across the planet. Characters from different eras move from one time period to another trying to discover why this is happening. I'm sure the book is long out of print. Does anyone know this book? I appreciate whatever help I can get. Thanks.
I've seen more than one book with that premise, but the first one that comes to mind is Time Storm by Gordon R. Dickson.