A pencil box of bees
It is a rose-tinted piece of recollected pleasure - one which raises more issues than first appear, not least about whether how young admirers could or would have such meetings today.
These were not interviews, promotional opportunities, book-tour signings - just lunches.
Some readers may already know which of the four great men told Isenberg a joke about keeping bees in a pencil box.
Those that don't - and those that do too - can read the memoir for themselves right here.