Former Pink Floyd guitarist David Gilmour is not prolific. Rattle That Lock is only his fourth solo studio album (though it follows his late band's final album, The Endless River, by only ten months). Gilmour recorded some 35 songs for this set, some dating back 18 years. Trimming them to ten couldn't have been easy. Titled for John Milton's second book in Paradise Lost, Rattle That Lock is structured as an informal song cycle to reflect the sometimes random, sometimes weightier thought processes of a typical person in a single day. It begins, appropriately, with the instrumental "5 A.M.." Orchestrated by Zbigniew Preisner, Gilmour's signature slow, bluesy, Stratocaster sting enters just 30 seconds in, followed by fingerpicked acoustic guitars, gentle synths, and electric piano amid chamber strings to announce the title-track single.