Eight-year-old Jack and his little sister, Annie, are playing in the woods during their summer holiday, when they find a mysterious tree house full of books. But these are no ordinary books . . . And this is no ordinary tree house . . .

Jack and Annie get more than they had bargined for when Jack opens a book about dinosaurs and wishes he could see them for real. They end up in prehistoric times with Pteranodons, Triceratops and a huge Tyrannosaurus Rex! How will they get home again? The race is on . . . !

Eight-year-old Jack and his little sister, Annie, are playing in the woods during their summer holiday, when they find a mysterious tree house full of books. But these are no ordinary books . . . And this is no ordinary tree house . . .

When they're whisked away to ancient Egypt in the tree house, Jack and Annie learn how to read hieroglyphics with the help the ghostly Queen of the Nile.

But secret codes aren't the only puzzle they have to solve. How do they get out of the pyramid full of mummies? And there's still the problem of who all these magical books belong to. Who is this mysterious M?

Eight-year-old Jack and his little sister, Annie, are playing in the woods during their summer holiday, when they find a mysterious tree house full of books. But these are no ordinary books . . . And this is no ordinary tree house . . .

Jack and Annie are in a treasure trove full of trouble!

Stuck on a desert island, captured by the evil Captain Bones and his gang and a huge storm at sea . . . For a while, it looks like they might not get home safely after all. And they discover that their adventures are even more magical than they had first thought . . .

Eight-year-old Jack and his little sister, Annie, are playing in the woods during their summer holiday, when they find a mysterious tree house full of books. But these are no ordinary books . . . And this is no ordinary tree house . . .

Jack and Annie find themselves on another adventure - this time they're in medieval England. It's exactly the same as the story book - there's a castle and a banquet and knights on horseback. But when they find themselves locked in a dungeon, Jack starts to wonder if they'll ever get home again . . .

Jack and Annie are on very thin ice!

Morgan Le Fay, the magical librarian, sends the children and the treehouse to the Arctic and tells them she'll send somebody to meet them there. But they're surrounded by ice and snow and there are huskies and polar bears all around them too - will they freeze to death first?