From the cute and cuddly to the giant and hideous, on distant planets to our own backyards, aliens have different motivations for making contact. Sometimes inquisitive, sometimes defensive, and sometimes, unfortunately for us, aggressive, these other-worldly visitors have agendas we can only begin to uncover. Join some of today's most imaginative writers as they show us just what happens when we encounter these strange and wonderful beings from the far reaches of space. Are they friend or foe? You decide.