Sweet's new, quick read based on Ernest Shackleton (arguably one of the greatest leaders of all time---who failed in his primary mission) is refreshing to say the least. 'Summoned to Lead,'--like many other Sweet books--is well-researched and compelling in its discoveries and challenges. It focuses on the apsects of leadership rarely talked about and is such a little inspiring gem, you'll be surprised at how after each chapter, you feel like you could tackle the world. That may be trite to say, but it's rarely felt as often as people would like to think or believe. While the only thing this book seems to be weak in is how it too often falls into the mythological or allegorical or ideological language...but most of the time, it's refreshing. A solid read, and recommended highly.