The Time Travelers by Linda Buckley-Archer

This is book one in "The Gideon Trilogy" and it's written for tweens--but I really enjoyed it. My daughter really liked it too.

Peter Schock and Kate Dyer have just met and are very different from each other, but because of a freak accident, they find themselves stranded together in the year 1763.

The titular Gideon is the first person they meet in 1763 and he believes their unlikely tale and promises to help them figure out how to return to 21st century England.

This is a fun adventure story that does NOT end satisfactorily because, of course, it's the first of three. My one faint complaint is that this is one of those books in which bad things happen over and over to our main characters. I get tired sometimes of all the fixes they have to get themselves out of. But! It's fun reading, even for a grown up and especially for kids.