I wrote a book about rock piles last spring but it has too many photos to get online easily. You might find it worth poking around in what files I did have room for - often the photos which are there appear half-way down the page, so keep scrolling even if you do not see pictures at the top of each page. Each chapter is a separate web file [and the first two are available elsewhere online so were deleted for space] so you have to start at the top and click on the blue underlined links. Start by [click here]
If you want a full copy of the book, contact me and I can try to send it to you on a CD.