Grandfather Ghost (Old Code, #2)

Retired, reclusive, and too smart to die.

Hacker Ajay Andersen knows his retirement isn't always going to be sunshine and roses. He's committed to protecting those he loves, and sometimes that's not going to be easy.
But things get complicated fast when he finds Silas Cardoso's body in his living room.
An environmentalist entrepreneur threatens the very wilderness he once protected. Mercenaries hold information that could endanger Ajay's granddaughter Kylie. If he's going to make things right,...