Writing about a well-researched subject is a daunting task. How can you, as an author, find something new and/or interesting to say about something that’s been written about a dozen, or several score, or even hundreds of times?

Craig Shirley has definitively answered that question: Give them the back story — and the back story on the back story.

In other words, sometimes, it’s not what you say, it’s how you say it.

In “Rendezvous with Destiny: Ronald Reagan and the Campaign That Changed America,” Shirley goes where, at last count, roughly 900 authors — including Lou Cannon, William F. Buckley Jr., Martin and Annelise Anderson, Steven Hayward, Richard Reeves, Paul Kengor, Andrew Busch, and Peter Schweizer, among others — have already gone.