Together Again: Gone missing twice

Nova loves to sneak out the house, no matter how hard I try to keep him in. The first time he went missing some one took him from our yard, he was found after getting out from the person who took him. After bringing him home he was good for a few weeks then he got out again.  After 2 months I got a call from the humane society in the next state over that they had him. So he is once again home thanks to his microchip!