Macmillan Publishers announced plans to integrate Amplify, an AI tool from CHAPTR (Holtzbrinck's AI company), which generates visual marketing assets such as promotional images by using existing book cover art and metadata as inputs.

Amplify is described by CHAPTR as a forthcoming service that generates visual marketing assets from existing book covers and metadata, aimed at reducing the manual design workload for backlist optimization and enabling publishers to scale 'A+ content' across retail platforms like Amazon. Publishers Weekly reported on Amplify in the context of Macmillan's CTO appointment in March 2026, describing it as a service under development. As of the most recent sources, Amplify is described as 'forthcoming,' meaning it has been announced but not confirmed as fully deployed.