What is the author's tone in Expecting Adam: A True Story of Birth, Rebirth, and Everyday Magic by Martha Beck?

The tone of this novel initially is lighthearted. Ms. Beck begins her story by talking about her career at Harvard and how intimidated she felt being around so many intelligent people. This sets up a background by which the reader can appreciate the change that takes place in Ms. Beck and her family as they deal with a difficult pregnancy.