Scrumban (2009) is corey-ladas's book coining and developing the Scrumban concept — a hybrid approach combining Scrum's structure with Kanban's flow-based practices. Published by Modus Cooperandi Press (the publishing arm of the consulting firm Ladas co-founded with Anderson and jim-benson), the book grew from blog posts Ladas wrote while serving as process coach at corbis.
The Scrumban concept addressed a practical problem: many teams were already using Scrum and wanted to adopt Kanban's WIP-limiting and flow-management practices without abandoning their existing Sprint structure. Ladas showed how to evolve a Scrum implementation toward a Kanban system incrementally — an approach that embodies Anderson's evolutionary-change principle applied to the transition itself.
Ladas presented detailed Scrumban scenarios at Agile 2008, and the concept gained significant traction in the Agile community as a pragmatic middle path between prescriptive Scrum and the full kanban-method.