The “Little Book” on residuality has been released. “Residues: Time, Uncertainty, and Change in Software Architecture has been released digitally here: https://LeanPub.com/residuality
This has been produced as a gift for attendees of a major software conference, and is released to give everyone a chance to get access to it. At 44 pages long it is concise and precise, and avoids the academic style of the articles published earlier.