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Reda Kandil , Technical Support Manager , TransIT (Transport Information Technology Co.)
PMP book especially HR and Communication Knowledge Areas
Leadership Skills and Project leadership which you can download from http://bookboon.com/
Finally leadership as a Soft Skills is a Talent You should read for Knowledge and train your mind and observe your Actions and take corrective actions according to Your gained Knowledge then by repeating this process with different situations you will be the leader . Good Luck