The 39-Story Treehouse by Andy Griffiths
Calling all boys - The 39-Story Treehouse has arrived!! Andy and Terry are back in the next installment of the treehouse series. They have added thirteen more stories to their incredible treehouse. Again Terry and Andy are asked to write a book by Mr. Big Nose, but they only have a day in which to complete it which is a BIG problem. Terry has an answer for their problem though because he has made the greatest invention ever - a "Once-upon-a-time-machine!" The machine lets you set the characters, the setting, the action, the type of genre, the amount of romance, different types of transportation, and the length of a story (in this case a 344 page story). It's highly secure too due to the fact that it has "Big-Toe Recognition Security;" if any unauthorized big toe tries to start up the machine, it will self-destruct instantly (a foreshadowing moment!). However, the machine takes over the treehouse which sends Andy and Terry on a mission to find a way to gain control of the treehouse again. That's all I'm going to say, because you just have to read their crazy new adventure.
Oops, I fibbed. I have one more thing to say. To all fans of this series, the book alludes to boys building another 13 stories to the treehouse. Dare we dream what the next 13 stories will have in story for us readers?