I was recently asked whether I’d ever consider collaborating with another author. I’ve had to give it some serious thought and, to be honest, I’m still thinking about it because of previous experiences. One, in particular, still stands out though many years have gone by. Sometime in either 2004 or 2005, what had been an extremely close ten-year friendship came to an abrupt, unresolved, and unsettling close. Peter (not his real name) was my best…