Boreal Books, founded and edited by Peggy Shumaker, a former Alaska writer laureate, has since 2008 been publishing exemplary poetry and prose by Alaskans. This summer it’s brought forth two new very different but complementary poetry collections. Emily Wall’s “Breaking into Air” grew out of a project gathering birth stories from parents and others. Marybeth Holleman’s “tender gravity” explores, tenderly, a wide range of life encounters with heart-hurts and solace, especially in the natural world.