Zimbabwe - Donated Books Stolen - NYTimes.com The Education Ministry said Friday that it was investigating how textbooks donated by the United Nations children's agency, Unicef, wound up in the hands of bookstores and street vendors. Unicef has supplied 22 million books since 2010 after a decade of economic distress left many schools without teaching materials. The books, stamped with Unicef and government emblems and the words "not for sale," sell for up to $10 on the street or $20 in a bookstore. A teachers" union official said teachers might be stealing them to supplement salaries of about $220 a month.