"The Vanderbeekers on the Road" by Karina Yan Glaser

Hmm.  Although I still very much enjoyed this latest installment in the Vanderbeekers series, I didn't love it quite as much as the first five.
This book picks up right where The Vanderbeekers Make a Wish left off, with Mrs. Vanderbeeker and all her kids, plus their friends Mr. Beiderman and his ward Orlando, setting off in a borrowed van to pick up Mr. Vanderbeeker.  They follow the cross-country route his dad had planned to take him on twenty years earlier, stopping at places like the St. Louis...