Wall Street’s Former Top Woman Tells Her Side of Lehman’s Collapse

On St. Patrick’s Day of 2008, Erin Callan’s boyfriend, Anthony Montella, marched in the annual parade with the New York City Fire Department for the last time. He had asked if she could “sneak out for an hour to see him go down Fifth Avenue” in his dress blues.

“That possibility was completely implausible, but he had no idea,” Ms. Callan—now Ms. Montella—writes in her new self-published book, “Full Circle: A memoir of leaning in too...