The messages inside Mother’s Day cards don’t come even close to expressing how you feel. Instead, try Motherhood: Poems About Mothers, www.barnesandnoble.com(Everyman’s Library, $12.50), filled with more than 100 poems by such writers as Anne Sexton, Elizabeth Bishop, e.e. cummings, and Thomas Hardy. And while cards get thrown out (and chocolates eaten and flowers tossed), this little volume will find a home on Mom’s bookshelf.