To the best of my knowledge, this is the most current version of this classic.
I had originally purchased this book and a couple of other of Langford's titles, not because I was new to photography but because they collectively provided an insight into modern photography, or rather the way it was in the late-80's or early-90s and pre-digital.
The late Michael Langford was a lecturer in photography in one of the major art colleges and quite highly regarded. His books were very well-written, informative and sold in high numbers through several reprints and updates. As far as I can recall, he was in the process of updating some of the books for digital photography, which had not then taken over from film quite so thoroughly as now and that demanded substantially different approaches, when he died. The reins were taken up by others and there have been yet further periodic updates as digital photography continues to expand.
Initially, digital cameras were of one of two types; the viewfinder cameras that had a simple optical system to provide a view of the approximate image field and the DSLR (digital single-lens reflex) which used the shooting lens and the camera sensor to display an image in an advanced optical viewfinder. The latter often had additional features including a much larger sensor, multiple exposure modes, a wider range of shutter speeds and faster lenses that were also interchangeable. A little later came the bridge camera, a cross between the two, that basically used the physical size of the former and some of the features of the latter, but in a rather simplified form. Professional forms of both original types also surfaced and since also two more, the compact (a compressed version of the former) and the system compact, a semi-professional version with interchangeable lenses with a quality similar to those of the DSLR and with similar speeds.
In essence, the book is periodically updated to reflect the broader changes in the cameras being manufactured and sold. Film is now rarely used and then only by few professionals needing the ultimate in image quality, many of the established favourites are no longer manufactured and most of the photo-labs that once existed have either closed or converted to digital. The only option for many wishing to use film is to 'do-it-yourself'.
If another update has not been released since this version, there will be in the not-too-distant future.
A very worthy addition to any photo library, although you do not need to purchase every update.