I LOVED this one!!! From the moment it started, with the mysterious elderly man staring intently at the h, I was hooked!
I've always loved time travel romances (the good ones, that is) and this one had a twist, in that the couple weren't separated by centuries, just decades (his 1950's to her 1990's). Those four decades made for quite a number of changes in society, ones that the H doesn't know when the h travels back to his time, and it's interesting how she tells him of the changes - both good and bad - while at the same time, she enjoys the more simple, less fast-paced life and realizes progress has its drawbacks.
She also mentions something I've thought of before: how women get shortchanged both ways. back in the 50's, many were discouraged from having careers no matter how much they wanted them, while in modern times it goes the opposite way, and now they're discouraged from staying home and raising children, expected to have career aspirations whether they want them or not. Either way isn't very fair.
What I loved most was how much the H and h loved each other, each thinking more about what was best for the other, rather than themselves. You get the conflict from their situation in respect to time, rather than the usual jealousy/misunderstanding thing.
What I didn't like is the h's precarious health after every time trip, getting worse each time, until she ends up in a coma and nearly dead! It was a bit much, and I could have done without it. Also, the whole camera thing was never fully explained, as to how it becomes a means of crossing time. It was intriguing, but didn't really make sense.
The h's close relationship with her twin sister - whose personality is as different as their looks are similar - was a good side story, though the part at the end where the sister sees the h in the present, after living in the past, and she now could be her grandmother was a bit over-the-top. And she can't acknowledge her, because it might break the time continuum, as each time the h went back in time, if her sister called to her in the present, she'd be forced to return from the past.
Yes, it's a bit involved, but still a great story, one that should be on your reading list!