Malcolm GladwellThos Robinson/GettyMalcolm Gladwell.
Having sold more than 4.5 million books, Malcolm Gladwell is one of the most popular authors alive.
He's made a career revealing the hidden factors that affect our lives and livelihoods — for example, by unpacking the personality traits that made Steve Jobs and IKEA founder Ingvar Kampran so outrageously successful.
And like every great writer, Gladwell is a great reader.
After sifting through more than 10 years of columns and interviews with the author, here are nine of the books that have influenced him the most.