Author Walter Isaacson paints a masterful bio with 'Leonardo Da Vinci'

According to the Italian painter and writer Giorgio Vasari, upon his deathbed Leonardo da Vinci lamented how much he had “offended God and mankind in not having worked at his art as he should have done”.

If there was one particular quality that matched (and was central to) da Vinci’s genius, his tendency to procrastinate meant that most of the artist’s works were left unfinished and many commissions left abandoned, much to the chagrin of his patrons.