Who is J.D. Vance, Trump's pick for vice president?

The Republican National Convention in Milwaukee saw Donald Trump officially nominated as the GOP presidential candidate. Shortly after, Trump announced Ohio Senator JD Vance as his vice-presidential pick. Vance, a Marine veteran and Yale Law graduate, was once skeptical of Trump but has since become a strong supporter. His selection aims to appeal to Midwestern voters and bridge the generational gap in the electorate. Delegates at the convention expressed support for Vance, who is well-regarded in conservative circles.

What qualities of JD Vance were highlighted as reasons for his selection as vice president?

What is the title of JD Vance's book that is referenced in the text?