The Piano Project: Moving Forward on the Piano is a great product for individuals who are serious about starting or refining their piano playing skills.
Nimble A to Z: continuing The Piano Project (David Pennant Piano)
The Rosie Project
The Proust Project
The Salad Project: How to build unlimited salads
The Sock Project: Colorful, Cool Socks to Knit and Show Off
W. A. Mozart: Nineteen Sonatas For The Piano | Sheet Music for Classical Pianists | Piano Solo Collection with Standard Notation for Students and Performers | Schirmer Library of Musical Classics