Due to some people asking about pdf apps. 9 N4 ?! f( _0 y c0 i/ g' o: K I use android apps " repligo reader "which has the highlight feature on playbook,but playbook has bugs - D- L+ B5 }3 v3 o3 a5 q& _+ [: d... " a4 p4 f) S8 o+ S/ zalso I use goodreader for ipad...