While reading, I could not stop thinking this could have been an essay - and a brilliant one. Author goes around and around explaining particularities of what his friend is quoted saying when asked to summarize the book:

"Everything gains or loses from volatility. Fragility is what loses from volatility and uncertainty. The glass on the table is short volatility."

Still worth the read, just brace yourself for personal anecdotes and reminiscences from Taleb's past and family history.