"Mark knew his dad left because of him. It was his fault." Mark Prescott is sure that's why he and his mom had to move to the small town of Odyssey. Oh how he wishes things could return to the way they were, before his dad left. Mark hates being a newcomer. He's not too thrilled about his only new friend and being a girl. That is, until Patti tells him about a time machine called The Imagination Station at Whit's End. Mark figures that's the answer to all his problems. If he can only go back in time to the day his dad left, then Mark is sure he can bring his parents back together again. But first he's got to get past the time machine's eccentric inventor, John Avery Whittaker, "Whit." As Mark's adventures unfold, he learns lessons about friendship, responsibility, and living with change.

"I didn't do it I don't know anything about his tire " Mark Prescott's in trouble. Not only did he fight with Joe Devlin, but now Joe accuses Mark of slashing the tire on his new bike. He didn't do it, but how can he prove his innocence? By finding the culprit But playing detective isn't as easy as it is on TV. As Patti, Mark's best friend, plays Dr. Watson to his Sherlock Holmes, Mark encounters a crows of potential villains. There's Rachel, a girl Joe teased about being fat. And Chad, the boy who had an argument with Joe. Even Patti is under suspicion. With the help of his wise friend Whit, the eccentric inventor, Mark untangles the mystery and learns new lessons about friendship and family ties.

"You have to promise not to tell anyone. Ever!" Mark Prescott promises Patti that he'll never reveal the secret of her hidden cave. It's a great place for pirates, buried treasure, and secret meetings. When the Israelites, a gang Mark wants to join, are looking for a new clubhouse, Mark thinks of the cave. He's positive they would make him a member if he told them about it. But Patti doesn't want to share the cave. And she doesn't want to join the Israelites. Mark is torn between his friendship with Patti and his new friends. Will Mark join the group at any price? Will he betray the hideaway? Will he risk his friendship with Patti? As he makes his choices, Mark learns about faithfulness, the need to belong, and the gift of forgiveness.

"It hadn't occurred to him that he might be putting himself in serious danger. Not until now." Mark Prescott's imagination is going wild. He knows his friend John Avery Whittaker (Whit) keeps his attic door locked. But why? What's hidden up there and protected so carefully? Invited to stay with Whit while his parents are in Washington, D.C., Mark grows curious when Whit forbids him to enter the attic. Fueled by thriller comic books, his mind conjures up dark possibilities. Along with them grows a determination to get beyond the locked door and learn Whit's secret. How will Mark gain entrace? What will he find once he does? As he answers those questions, he learns hard lessons about trust, honesty, and the need to guard his thoughts.

"We have a three-strikes-and-you're-out policy here. You now have two strikes." Mark Prescott is not having a fun time at summer camp. First of all, he went there so he could talk with his best friend, Patti. But she only wants to discuss her new boyfriend. Then Mark finds he's sharing a cabin with Joe Devlin, Odyssey's biggest bully, who gets Mark into trouble with the camp's leaders. Mark grows irritated by the unfairness of his situation and Joe's obnoxious behavior. Yet Mark feels there must be some hidden reason Joe has become expecially bad. Finally, Mark and Joe find themselves paired in a treasure hunt that puts them in unexpected danger. Through his adventures in camp, Mark learns valuable lessons about friendship and how God uses one person to help another.

"Sir Owwen cried out to Mark, 'An ambush! Quickly!' Even as he shouted, he grabbed the guard by the wrist, twisted it so that the sword dropped free, and scooped up the weapon." Mark Prescott is not in Odyssey anymore. The Imagination Station has propelled him back in time to the era of brave knights, great castles, an evil nobleman, and a good king. Now Mark finds himself in the middle of a quest for the kind to retrieve a precious ring. But first he has to survive the wicked Sir Cardoc's plan for him! And then he and the valiant Sir Owwen will have to find and do battle with the most dangerous creature in the realm. As Mark moves from adventure to adventure, he learns iimportant lessons about God's control over his life and how He uses even the most difficult experiences to accomplish His will.

"One thing I've learned is that nobody is what they seem to be." That's what the new kid told me, anyway. And he just might be right. Things have beena bit strange around Odyssey lately. My name's Jack Davis. My friend Lucy just told me that an escaped convict could be heading straight for our town! On top of that, I know Joe Devlin, the school bully, is repeating sixth grade. I'm not sure which of the two I should be more afraid of. And if that wasn't enough, that new kid, Colin, has been telling me some really wild stuff. I'm not sure what to think, but I could sure use your help in figuring out who to trust!

Turning over a new leaf isn't as easy as Jimmy Barclay thought it would be - some old habits are hard to break. After years of being nagged by his family to go to church, something strikes in the depths of his soul, and he makes the biggest decision of his life. But is it a huge mistake? His friends abandon him, his grandmother has fallen ill, and the only kid who seems to understand what he's going through moves away. Does it matter anymore if he tries to do the right thing? Is this the thanks Jimmy gets for trusting God? Is He there, and does He care? Through his challenges, Jimmy discovers that standing up for what you believe can be costly - and rewarding!

Turning over a new leaf isn't as easy as Jimmy Barclay thought it would be - some old habits are hard to break. After years of being nagged by his family to go to church, something strikes in the depths of his soul, and he makes the biggest decision of his life. But is it a huge mistake? His friends abandon him, his grandmother has fallen ill, and the only kid who seems to understand what he's going through moves away. Does it matter anymore if he tries to do the right thing? Is this the thanks Jimmy gets for trusting God? Is He there, and does He care? Through his challenges, Jimmy discovers that standing up for what you believe can be costly - and rewarding!

"Run!" the reverend shouted. "Run for your lives!" In that split second, life for Matt Booker and his best friend, Jack Davis, turned into chaos. Boy, were they in a lot of trouble! It all started when they were plaing catch in the yard at Whit's End. Jack missed a pass and, while searching the woods for the ball, stumbled upon a trap door. If only Matt and Jack had obeyed the sign that warned, "Keep Out." But they didn't. And then they got carried away. Literally. Climbing aboard The Imagination Station, the two friends were propelled back to the days before the Civil War - not a good place to be if, like Matt, you're black. After interrupting a meeting with the Reverend Andres,who was helping slaves escape to freedom along the Underground Railroad, well things just went from bad to worse! Matt was captured by slave hunters, leaving Jack and the revered to rescue him. But would they find him and in time?

The door to The Imagination Station whooshed shut, enclosing us in the machine. I'm Matt Booker. Jack Davis is a good friend - the best, especially since he's willing to go back with me. Let me explain. We knew we weren't supposed to be nosing aroundbut earlier, Jack and I were in Whit's basement workshop, checking out The Imagination Station, when the craziest thing happened. All of a sudden, we were back in 1858! Cool? Not exactly. We're talking pre-Civil War here - before "emancipation," when slaves were given their freedom. If only I had paid more attention in history class! Anyway, to make a long story short, I had been captured by slave traders, and it was up to Jack to find me. In fact, I had just promised Eveline, a runaway slave, that I would help her find her father, Clarence, when - bam! - Jack and I were instantly back in Whit's basement. Well, I couldn't break my word to Eveline, so Jack agreed to return with me to help her and Clarence make their way to freedom along the Underground Railroad.

A homeless man's arrival in Odyssey challenges Whit and the young people of the community to consider what it means to live as Christians in difficult situations

When Patti wins a stuffed bear at Odyssey's spring carnival, a series of strange events lead to a mystery and reunite her with her friend Mark who now lives in Washington, D.C.