Danny Dunn Scientific Detective Author:Jay WIlliams and Raymond Abrashkin Professor Bullfinch invents a foolproof safe for Midston's biggest department store. The lock works by smell and will only open when it detects the scent of the manager's hand--or his assistant's. — Yet the day after the lock is installed, the manager vanishes and Professor Bullfinch cannot be found. The next day, the safe is robbed! has the mana... more »ger been kidnapped? Is the assistant part of a plot? And where is the Professor?
With Bleep, his robot bloodhound, Danny sets out to clear Professor Bullfinch of suspicion and discover who the real thief is!« less