its not an auther as such. it says on the front second edition entirely rewritten . at the bottom ,university of london animal welfare society.the u l a w s was promoting a parliamentary bill for the prohibition of the gin steel trap in great britain thats whats on back page .i think its main gripe was the other animals/birds getting caught.theres some chapters on setting longnets/gassing using car exhaust .it seems the trappers got more money for a trapped rabbit than one caught any other way