233.45  Penalty for school officers dealing in textbooks.--No superintendent, school board member, or any person officially connected with the government of or direction of public schools, or teacher thereof, shall receive during the months actually engaged in performing duties under his or her contract any private fee, gratuity, donation, or compensation, in any manner whatsoever, for promoting the sale or exchange of any school book, map, or chart in any public school, or be an agent for the sale, or the publisher of any school textbook or reference work, or be directly or indirectly pecuniarily interested in the introduction of any such textbook, and any such agency or interest shall disqualify any person so acting or interested from holding any school office whatsoever, and the person so offending shall be guilty of a misdemeanor of the second degree, punishable as provided in s. 775.082 or s. 775.083; provided, that this section not be construed as preventing the adoption of any book written in whole or in part by a Florida author.