Write Me In.

This fall, Gross marks her 40th anniversary hosting ‘‘Fresh Air.’’ At 64, she is ‘‘the most effective and beautiful interviewer of people on the planet,’’ as Marc Maron said recently, while introducing an episode of his podcast, ‘‘WTF,’’ that featured a conversation with Gross. She’s deft on news and subtle on history, sixth-sensey in probing personal biography and expert at examining the intricacies of artistic process. She is acutely attuned to the twin pulls of disclosure and privacy. ‘‘You started writing memoirs before our culture got as confessional as it’s become, before the word ‘oversharing’ was coined,’’ Gross said to the writer Mary Karr last month. ‘‘So has that affected your standards of what is meant to be written about and what is meant to maintain silence about?’’ (‘‘That’s such a smart question,’’ Karr responded. ‘‘Damn it, now I’m going to have to think.’’) Gross says very little about her own life on the air. ‘‘I try not to make it about me,’’ Gross told me. ‘‘I try to use my experiences to help me understand my guests’ experiences, but not to take anything away from them.’’ Early in her career, she realized that remaining somewhat unknown allows ‘‘radio listeners to do what they like to do, which is to create you.’’ She added, ‘‘Whatever you need me to be, I’ll be that.’’