Gelukkig Werken (in Dutch). A surprisingly good book on Happiness at Work (and I'm not saying this because I'm being mentioned in it :-) by Onno Hamburger and Ad Bergsma.
Worldwide well-being researcher & teacher <> Master in Psychology (focus on Positive Psychology, K.U.Leuven University); Master in languages (focus on science communication, K.U.Leuven University & Universität zu Köln); Organizations: European Network for Positive Psychology (representative for Belgium); Students of the International Positive Psychology Association (Executive Committee member); Centre for Applied Positive Psychology (Founding member); International Positive Psychology Association (Charter member); Evidence Based Happiness vzw (founder).