In the 19th installment of the Hardy Boys series, the brothers investigate a mysterious floor which disappears, leading them on a journey of adventure and intrigue.
Age
8-12
Text complexity
intermediate
Length
192 pages
Book in series
#17
Why to read
Learn about problem-solving in a fun and exciting way.
Enjoy the thrilling adventure and suspense.
Experience a well-written story that encourages perseverance and courage.
Join the Hardy boys in unraveling the mystery of the disappearing floor.
