Meri knows best friends forever don't always last, but why did her ex-best turn into the meanest girl in school? With help from one of the spunkiest girls in ch

Friends and enemies--sometimes it's hard to tell the two apart. Especially when some people seem to be both. In her bestselling book Mean Girls, Hayley DiMarco

Ida May finally fits in at school after becoming best friends with Stacey Merriweather, who is universally liked by their classmates. But then Ida?s frenemy, bo

In Frenemies Mark L. Haas addresses policy-guiding puzzles such as: Why do international ideological enemies sometimes overcome their differences and ally again

Selected as a finalist for the 2018 Leonard L. Berry Marketing Book Award! Why do crucial business partnerships and alliances fail so often and how can you keep