The 6th and final book in the "TJ and the Time Stumblers" series, Yikes!!! is a fun ending to this great series. Set mostly in the African jungle (three guesses how they got there), Tuna and Herby almost have everything they need to get back to the 23rd century. TJ is finally seeing some truth to her future as a great world leader, stepping up to lead the way for her science class to get out of the jungle and rescue Hesper Breakahart as well.
Full of the typical catastrophes that happen when you hang out with Tuna and Herby, TJ realizes that strength of character might be one of the most important factors in a friendship....and that she just might miss Tuna and Herby after all.