Gathering 115 entries written by 101 internationally renowned experts in their fields, the Handbook of Whiteheadian Process Thought aims at canvassing the current state of knowledge in Whiteheadian scholarship and at identifying promising directions for future investigations through (internal) cross-elucidation and (external) interdisciplinary development. Two kinds of entries are weaved together in order to interpret Whitehead secundum Whitehead and to read him from the vantage point of interdisciplinary and crossdisciplinary research. The “thematic ” entries provide (i) a broad contextualisation of the issue at stake; (ii) a focus on Whitehead's treatment (if any) or of a possible Whiteheadian treatment of the issue; (iii) a history of relevant scholarship; (iv) a personal assessment by the Author. The “biographical ” entries provide (i) a brief vita of the targeted thinker; (ii) a sketch of his/her categories relevant to the Whiteheadian scholarship; (iii) a personal assessment of the actual (or possible) Whiteheadian semantic transfer to or from the thinker.