Cyberattack seems to be all the rage these days.
If you enjoyed this – read John Birmingham. He’s one of Australia’s best speculative fiction authors. Seriously! ZERO DAY CODE describes this scenario – but with meticulous, analytical detail – and awesome characters! Birmingham is all about the characters. It’s as if Tom Clancy wrote a Cyberattack collapse novel.
And it’s chilling.
Eclipse Now 
Thanks for this recommendation – have just finished Birmingham’s trilogy!
Great to hear! If you have any more holiday reading time check his other stuff. Weapons of choice is a modern battle group that runs a physics experiment that goes wrong and shoots them back into midway. It’s a dirty old SciFi trope – but because it’s Birmingham – it’s SO good! Forget the new technological arms race, it’s the 21sts and WW2 cultures in conflict that are interesting. There’s also fun background info, like one character hears that Stalin got an iPad and his favourite TV series is The Sopranos!