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I loved the stories describing how George Washington rallied his captains with charisma and honor, or how Abraham Lincoln wowed the crowds with his silver tongue. I wasn't keen on several excerpts from Obama's speeches as it's premature to assess the resiliency of his leadership.
The book is filled with inspiring quotes and is enjoyable to read, but their small sample size of leaders doesn't provide enough information into what makes leaders resilient. They make conclusions that sound good, but they're based on a handful of examples instead of a statistical analysis of leaders and their success. It's a tough thing to measure objectively and instead of tackling the hard problem, they chose to pick some of their favorite leaders and talk about how their honor and integrity was all that it took.
Not all resilient leaders share the attributes they espouse, but by not discussing those leaders one is led to believe all must espouse the same principles.
In short, it's a fun read, but it needs more research to back up the premises if it wants to stand on its own.
Note: I assume typos and grammar issues will be resolved in the final version. I received a pre-release copy and ignored them for the purposes of this review.