Women in Genesis" series of novels and LOVED them!
This book takes place on a planet called 'Garden' which is inhabited by descendents of humans from earth. The main character, Rigg, lives on the planet in a wallfold (an area of the planet sectioned off by an invisible wall). He has a special ability to see 'paths' of where people have been -- where ALL people through time have been. He has a friend, Umbo, who can slow down time (or speed you up in time, depending on how you look at it). Umbo can use his ability along with Rigg's ability to see paths that people have taken, and push people back in time.
Their adventures (losing a father and a brother, finding a sister, getting caught up in political turmoil, and finding a way across 'the wall') made this a fun book to read. Among all the happenings of Rigg and Umbo, the tale of how the planet became inhabited by humans and how it ended up divided into 'wall folds' is also told.
There is no racy scenes, no cursing, and no immoral behavior (other than steeling a knife from a person in the past who has been dead for hundreds of years, so not sure if that counts!).
Orson Scott Card actually has a trailer for this book on his official website. Go there to see -- it makes the book sound exciting (and it IS). It is supposed to be the first of a new series, but it stands alone quite well! I do hope for more, and am anxiously awaiting the next book, but it is not necessary to finish the story. I do recommend this book.