NOS4A2 by Joe Hill

 Vic McQueen has a secret.  When she is on her bike and riding as fast as she can, a bridge appears and when she crosses it, on the other side is a world in which she can find lost items.  Maybe it's a bracelet her mother left in a restaurant.  Maybe it's money.  Maybe it's a new friend.  But Vic doesn't tell anyone in this world about her other one.

There is evil in both worlds.  When Vic is seventeen, she is kidnapped by Charlie Manx, who takes children for rides in his 1938 Rolls-Royce with the license plate of NOS4A2, a play on the European vampire's name.  He takes the children to a place he calls Christmasland where the rides are free and everyone eats as much candy as they want.  But they also play dark games and over time the children become vampires as well.  They never return to their parents.  

Vic manages to escape, burning down Manx's house and given a ride out of that world by Lou, a teenager who happens to be riding by on his motorcycle.  She and Lou become an item, Charlie Manx is arrested and charged with her kidnapping.  She testifies against him and he is sent to jail.

Years later, Vic is grown but her life hasn't turned out to be a fairy tale.  She is still with Lou, off and on, and they had a child, Wayne, who mostly lives with Lou.  Vic has been in and out of mental institutions as no one believes her story of another world and convince her that it is the hallucination of a diseased mind.  Manx dies in prison after being in a five year coma.  Vic is trying to put her life back together with Wayne spending the summer with her when he is kidnapped and she knows by who.  She sees Charlie and his sidekick in that Rolls-Royce as they drive away with Wayne and she knows no one can save him but her.  

Joe Hill has written some of the best horror/mystery that I've read.  I loved his book The Fireman and I loved this one.  The villain is scary and powerful, the horrors are believable and Vic is a damaged hero that the reader can't help but love.  Her love for her child and Lou are unmistakable and she is brave enough to do anything to save them.  This book is recommended for horror readers.