jacobus: i wanted more, for myself.dn't think of going back to drugs or gangsterism and all of that. that didn't come close to my head. and zip zap gave me a taste, they gave me a bite of the apple, and i told myself i want more of this apple. and today, i've got so much more of that apple. reporter: jacobus claassen's day is not over yet. next stop, the zip zap dome in downtown cape town, a venue for performances and for afternoon training sessions. he coaches young “zappers” here several times a week. jacobus claassen made it with a clear goal in mind. but he knows you can't do it on your own. jacobus: the most important thing is, open yourself to other people. reporter: openness and mutual support -- a message that seems to be more important today than ever before. host: literacy is the key to education and success. and of course, that includes reading books. according to unesco, every year around 1.8 million books are published -- that's almost 5000 every day. unlike other sectors, the book trade weathered the coron