Michelle Obama's 'Becoming' has the longest run atop Amazon since 'Fifty Shades'
"Becoming" by Michelle Obama is not just one of the best-selling books of the past year — it is one of the hottest titles of the decade. The inspirational memoir by the former first lady has been on sale for more than two months, yet it is still No. 1 on Amazon's constantly updated list of best-selling books. Amazon said "Becoming" enjoyed the longest streak at No. 1 for any book since "Fifty Shades of Grey" came out in 2012.