I think a Time Travel book should be credible and not always demanding the readers to willingly suspend their disbelief. A Familiar Rain (Amazon KIndle e-books) is a very believable novel based on Wilder Penfield's electric needling experiments. Like Crighton's Timeline, there's some credible science behind it.
Can someone PLEASE recommend a really good time-travel romance? The only one I've read is "A Knight in Shing Armor by Jude Devereux. It was actually pretty good but I want to read one with more depth, character development and plot by a writer with exceptional skills. Is that asking to much?
ZENEI: You might check out the entire series by Diana Gabaldon. A female contemporary (1945) "time traveler" and a Swashbuckling-Scots-Highlander-Warrior tale. The series runs (at least, might be more by now, I eventually quit it) at least 5 volumes encompassing darn near 5000 pages. It was "romantic" but also darn entertaining with good historical story lines, lots of intrigue, battles and politics thrown in. Some engaging characters, especially the love struck heroine and her dashing and hard-nosed Scotsman. Try the first 1000 pages in "Outlander" and see if you get hooked, since it makes sense to start at the beginning! Hope you enjoy.