Painting by Lola Baltzell, in the show “Writing in the Margins: Lola Baltzell, Carol Blackwell, Amy Solomon and Valerie Spain,’’ at Maud Morgan Arts Chandler Gallery, Cambridge, Mass., through May 17. The gallery says: “We all share a passion for books and text, and the idea of text as object. We are all readers and book lovers, but also relish in altering books, searching for meaning in random words, foreign languages we don't understand. The title evokes many associations for us, as artists, but also for viewers as well. ‘‘