For many years I have had various online galleries to display a collection of my work. I would organize the gallery by topics such as People, abstract, nature, etc. On one occasion I created a PDF of a series of images around a single place and told a story. I am thinking more long term about how I display my images and looking for a way to build on a library rather than changing galleries every few years. IF you were to come across a website with images grouped in PDFs vs a thumbnail gallery - How likely would you be to download/open the PDF? Or are you more likely to scroll through a sliding panel ? Would the story added to the PDF add any weight to your decision. A good example of the PDF format would be Brooks Jensen's KoKoro where he explores a theme and related narrative.