What is the convicted murderer's name that invited Gerry on the boat and why was he sent to prison? Do you think it is wise for Gerry to go with this man on a boat and what did the man give Gerry to eat on the boat?

The convict's name is Kosti.

For the second part of your question, I will need a chapter number.

As far as Gerry's going on the boat, I likely wouldn't have advised it. Eveything did, however, work out well, and Gerry made a new friend.