Book 13 - The Theory of Evilution
Book 14 - Things Man Was Not Meant To Know
Book 15 - A Stone's Throw Away
On their way back from an adventure and dropping off members, Jacqueline decided to visit Stonehenge before dropping off Montague. As they were hovering above in the airship, they noticed that one of the lentil stones was hovering over the monument. And then they noticed a young man seeming to manipulate the stone. He also had a book with him similar to the others that Jacqueline has stashed away. After trying to resolve the poor fellow's pining away for his “sweet sixteen” (and failing), they reached an agreement that the poor fellow would translate the book he had and also translate the titles of the books Jacqueline has for passage to where he wanted to go. The group just met a young Edward Leedskalnin before he builds his Coral Castle in Florida.
Book 16 - Parts Is Parts
Book 17 - Look At What We Dug Up
Book 18 - Terror In The Skies
Jacqueline had had enough of the airship pirate and as no one else was doing anything about it, her group would. When they found it and caught up with it, the found out it was no ordinary airship. Instead of being covered in a cloth-like material, it was covered in some sort of ceramic! And very smooth! The group, being the group, was able to easily overcome any resistance and take over the airship. It is not like any airship ever seen! The inside and outside seems to defy gravity in a way the group can't figure out. It has been taken back to Jacqueline's airfield for further study.