Seattle Times Sports columnist Larry Stone. The name of the book is "My Oh My: The Dave Niehaus Story".
Stone said the book was written by Seattle based musician, Billy Mac, a fan who journeyed to the press box in the team's early days, wishing to meet the broadcaster. Mac had proposed the idea of a book to the late announcer, who nixed the idea thinking that no one would be interested. After the Niehaus passing, Mac took on the project with the blessing of the Niehaus family. You can order a copy of the book by clicking here.