Thank You, Mrs. M — Kate Rothwell

 I wasn't the only one telling a story. Anonymous Mrs. Moneybags tried to hide from me. Too bad I'm smart, Mrs. M, and I got you figured. But know what? I can keep your secrets.
You and me--we made it work.

Benjamin Evans takes charge of his younger siblings, but still finds time for
college--especially after he receives an offer of a full scholarship. The only
catch in the sweet deal is he must share details about school and some private
facts about his life. As he talks into the recorder over the months, Ben's
curiosity about his sponsor increases.

Loosely based on Daddy Long Legs, the novel by Jean Webster