7Stepdad 101, What to Know Before You Marry A Single Mom is a vital reading for any man thinking of becoming a stepdad. With a divorce rate higher than 70 percent, blended family couples fail at a rate higher than any other category. Stepdad 101 explains the hidden challenges that make stepdads leave at twice the rate of traditional marriages. Men who read Stepdad101 will know what to expect before they say "I do."