The list continues.  When there is no author it is because no author was listed after the name of the book.
 
81.  Book of Famous Poets
 
82.  The Magic of Oz-Baum
 
83.  The Scala-Wagons of Oz-Thompson (He must have taken over for Baum)
 
84.  Red Knight of Germany-Gibbons
 
85.  Keys of the Kingdom-Cronn
 
86.  Speedy in Oz-Thompson
 
87.  the Gnome King of Oz-Thompson
 
88.  The Romance of an Old Playhouse-Pyper
 
89.  Ozoplanning with the Wizard of Oz-Thompson
 
90.  Stories of Ancient Greeks