Among his most notable books is "Omdenken: the art of reverse thinking" (2014), which has gained popularity for its practical and motivating approach. He is also the author of other titles in the same vein, such as "Ja-maar wat als alles lukt" (2008), which consolidate his innovative vision on positive mental attitude. His texts are aimed at people who want to change their perspective and face adversity with creativity.
Berthold Gunster Books
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