In The Seven Crystal Balls (1948), Seven scientists mysteriously fall into a profound state of lethargy. As Calculus has disappeared,Tintin and Captain Haddock set off in search of the Professor.
Children's: picture books - activity books - early learning concepts, Graphic novels - Comic books - Cartoons
Age: From 8 to 12 years
Paperback
Herge
64 pages
H: 295mm W: 218mm Spine: 4mm
Weight: 270 grams