US Kindle store
UK Kindle store
And the description:
"Time travel's possible, Dennis. I know, because I've done it from right here in this room."
Dennis Marcher thought he was simply visiting college friends, seeing again the place he'd met the girl he married.
What he found was a doorway into the past. A doorway that would let them revisit some of their happiest days. A doorway that could let them go back to stay. A doorway that might let them change their pasts for the better.
Some doors shouldn't be opened.
Now, if you like your novels long, please note that this one's on the short side at 44,000 words. (Minimum length for a novel in the Nebula award categories is 40,000 words, which if memory serves is about right for one side of the old Ace Double paperbacks.) Check it out if you get a chance.
And if you don't get a chance, I hope it's because you're engrossed in other recently issued ebooks like these:
Rogue Moon, by Algis Budrys
The Hyde Hotel, edited by James Everington & Dan Howarth
Got to Kill Them All & Other Stories, by Dennis Etchison
Can & Can'tankerous, by Harlan Ellison
All of them good reading & well worth a look.