At age 20, Donna Wolfe followed her new husband on a two-year, round-the-world bicycle tour to produce what she hoped would be a chatty adventure/food memoir, incorporating recipes for whatever was edible or available above the Arctic Circle or in a war zone. But what emerges is a tale of mismatched travel partners as her original and at times hilarious coming-of-age story plays out in 19 countries from London to Sumatra, and a hundred states of mind.