These books, published in the 1960s, would have been the ultimate in 'new technology' at the time, offering the buyer not only a detailed textual analysis and description of works by famous artists, but also a range of associated colour slides - then perhaps the latest way of preserving images and displaying them to audiences larger than family groups (such as would have pored over photographs). After 50 years, the slides will no doubt have lost something of their original quality, but as a publishing curiosity, the books offer something to the collector of oddities.
The original series was huge, most volumes devoted to individual artists such as Picasso, Rubens, Da Vinci, etc. These two overviews, therefore, are perhaps less common.
Both books are in excellent condition, appearing virtually unused. The grey-green boards are clean and undamaged, with no fading; the black paper spines equally clean and sharp; gilt titling on front and spines as bright as when purchased. Inside, the cream outer covers of the booklets each have a darkened vertical stripe at the spine (see photo), but are otherwise clean apart from one or two very light marks. The pages are all clean and bright and the binding firm. The slides are in plastic/cellophane pockets inside the folding front cover of the volume, and are all present.