Luckily, they have a young sorcerer, Teddy, to help them. From underwater caves to a Spider Queen, from mystical selkies to a magical sword, this is a Magic Tree House adventure kids won't want to miss Winter of the Ice Wizard Jack and Annie, joined by Teddy and Kathleen (from earlier books), travel in the Magic Tree House to a land of snow where the Ice Wizard has captured Morgan and Merlin. The four friends must find the Ice Wizard's missing eye . . . or is it really his heart that is missing?

    

    That's what. When Kit wakes in the past she has no choice but to go with the knight that stands before. The sword at her throat determines that. With absolutely no idea on how to return home, Kit will be called upon to use every bit of strength and love to stay alive long enough to do so. Even with Marcus' help it might not be possible. Will these two lovers find a way to be together for all time? Can Kit trust that once made, it will never be broken? Perhaps. It is after all, A KNIGHT'S VOW.

    Where is she? How did she get here? How is she going to get home and whose backside will she kick first when she does? A woman lost in Middle Earth wearing only her pyjamas. This can't be good...

    They manage to gain the backing for the project from a wealthy financier. The trouble is, they can only go back 200 years, more or less, at a time and will have to make repairs to the time cylinder at every stop. Thus, they visit the historic California gold rush and then early Colonial America. Then, they are pulled forward unexpectedly to a future time of trouble, where robots serve and forced to fight in a senseless war. They manage to break free and take off only to discover they have a stow-away. But the stow-away has a device which will help them to go further back with each leap. Thus, they then time-travel to the Renaissance and meet the historical figure, Leonardo DaVinci, But, by mistake, they take off without the stowaway and his device. Then, they are pulled forward again, but only to the time of the Reformation, where they meet Martin Luther and have an argument over faith. Then, with the help of a new fuel formula, using alcohol, they manage to arrive at Camelot and finally, Ancient Jerusalem, where they, at last, realize the real answer: the true end and goal of their mission.