As we told you in the last issue, Concord has been exploding with art shows seeming to start and end at the same time. So in an effort to get to each and every one of them, we checked out three more last week before they each come to a close on Halloween. The work of Jim Wolcott is hanging in the Kimball-Jenkins Carriage House, Kari Zwick has taken over the walls of Dos Amigos and Maureen O’Brien Adams’s “A Tour of Europe” exhibit offers a glimpse into her three years of living and traveling in Europe at the Works Café.