Mark: In the Company of Christ by Jeff Manion

Mark's Gospel has an urgency to it that's hard to ignore. It's as if he is breathless, trying to get the information out as quickly as he can. A few decades have passed since Jesus' ministry, and with persecution intensifying, some believers were tempted to compromise or simply give up on being a follower of the Messiah. 

So, Mark needed to take the early Christians back to the basics and get them ready to move!