While you can read the first two in any order, most readers suggest starting with the first published book to understand the universe's "Zones" before diving into the more grounded prequel. Another reading order post ... Zones of Thought : r/printSF
This guide covers the series by Vernor Vinge, a seminal space opera known for its unique "variable physics" setting where intelligence and technology are limited by their location in the galaxy. The Books in Order A Fire Upon the Deep; A Deepness in the Sky; Th...