What to read to understand intelligence and espionage

News Snapshot:

Spies have played an outsize role in the war on Ukraine. American and British intelligence agencies found out, and then exposed, Russia’s war plans for Ukraine months ahead of time in what was the biggest intelligence coup since the Cuban missile crisis. Russia’s “special services" had a torrid time. First they bungled their part in the invasion of Ukraine. Then more than 400 of their officers were expelled from embassies across America and Europe. Finally, they watched as a string of precious “illegals"—spies who operate without diplomatic cover—were rolled up in the Netherlands, Norway, Poland and Sweden. In December even...