This pocketbook documents the evolution of the World Sustainable Development Summit across its twenty-five editions, highlighting its emergence as a globally recognized multistakeholder platform anchored in the Global South. It captures how WSDS has complemented formal multilateral processes by convening diverse voices and advancing sustainability through the lenses of science, equity, and implementation, while translating the Sustainable Development Goals from global aspiration into action. Tracing a sustained journey which is shaped by dialogue and evidence-based engagement, the volume serves as a record of collective progress and as a call to move from ambition to delivery, acknowledging with gratitude the extended community whose commitment has sustained and strengthened the Summit over the past quarter century.