This title is a bit different from the others in the series, focused on digital photo restoration rather than a specific period/genre of images. It may be constrained for some by using Photoshop to walk through the processes (I've switched over to Affinity Photo, for example), but the tools and processes remain useful even if some of the detailed steps may be different; this may become more of a limitation over time, as the software options change. But for a basic walk-though of how to think through and make repairs to old photographs, this is probably as good an introduction as is available.