 The seclusion of his mountain sanctuary offers him a good opportunity to pursue and enjoy his lifelong passion in writing his books <unk> at a leisurely pace . Upon requests from his readers and supporters , Khoo still travels once a month for a few days to " <unk> " – a term he coined for sharing the wisdom of Sun Tzu 's strategies for success and happiness for his <unk> and conference audiences . Khoo has " <unk> " thousands of " pupils " of his clients , among whom were well @-@ known corporations like <unk> , <unk> Systems , Citibank , <unk> @-@ <unk> , Intel , Johnson & Johnson , Port of Singapore Authority , among many others , and also government bodies such as the Prime Minister 's Office of Singapore , <unk> and Malaysia . To keep in touch with his readers , Khoo writes monthly <unk> touching on contemporary issues using Sun Tzu 's perspective . While not travelling in the region to teach , he enjoys writing fiction and has had three fiction books published to date – Taikor , <unk> and Nanyang . 
