Finding Cathcart: Book Five of Zach's Story: Book Five of Zach's Story (Second Edition)

Zach is obliged to pay a school visit to the Shady Glades Rest Home, where he meets the mysterious Mr Cathcart, who's suffering from amnesia.  Who is Mr Cathcart?  How did he lose his memory?  Who's paying for him to stay at Shady Glades?

Zach and his friends pledge to help Mr Cathcart recover his memory, and they succeed where the doctors have failed. In unlocking the secrets of this old man's past, however, they expose him and themselves to danger.  Someone tried to murder Mr Cathcart once, and now that Mr Cathcart has recovered his memory, that would-be killer could strike again.  Can they save Mr Cathcart a second time?