"You always start out solving mysteries with the idea you'll be perfectly safe and you always end up getting into hot water." p.3Nancy gets involved in a mystery involving a crazy house with a robot. Investigating a swindler (of course) she, Bess, and George travel to a town where the swindler lived. There they deal with the crazily built house with a fire moat and a robot set to stun. It is a pretty interesting mystery and involves something a bit different than her usual stuff.
The Secret of Mirror Bay (Nancy Drew Mystery Stories #49)
"...but sometimes Nancy becomes too enthusiastic and runs into danger." p.91Nancy goes to a camp at Mirror Bay with her friends and her Aunt Eloise. There they solve the mystery of the gliding woman who seemingly walks on water and the mystery of a missing antique child's carriage. She also becomes involved with a haunted forest and a mysterious sorcerer.
The Double Jinx Mystery (Nancy Drew Mystery Stories #50)
The woman looked a bit startled that such a lovely and wholesome girl would be trying to track down a criminal, but she made no comment and said good-bye. p.93Nancy and her father are jinxed with an underhanded construction company tries to condemn a man's property including his aviary and zoo. Nancy will not let it stand however and tries to prove that the mysterious going-ons are the result of the company. Along the way she and Ned contract bird flu and have other unfortunate things happen to them.