Regional books of note for April: “Bless the Birds,” by Susan Tweit (She Writes Press) Toward the end of her husband’s two-year battle with brain cancer, Susan Tweit told him, “I want you to know you can take your time letting go. You don’t need my permission, either.” “What a beautiful benediction,” her husband replied. “Our love will last when we don’t,” she told him. Anyone who has lived through the long and painful death of a loved one is tempted to write about it. The idea is to give death — and life — meaning. Rarely do those accounts rise to the level of poetry. Tweit’s does. Well known for her essays, Tweit turns the story of her husband, sculptor Richard Cade, into a moving tribute. Cade’s cancer battle began when he saw birds, hundreds of them, on trees and grasses and distant mesas. Only there weren’t any birds out there. That was the start of surgeries and treatments, sometimes twice-weekly trips from their Salida home to the VA hospital in Denver. In the midst of the battle, the couple embarked on the honeymoon trip they hadn’t taken when they married 30 years earlier.