Both books from Rance the Complete. First the Chronicle and then the Data file book. Box, obi and order card? are at the end. Seems to have been released around the time of Rance VI, the first book details the Rance series and the 2nd book is more of a walkthrough like book. Not much original art in this book, it takes most from the games. There's a few sketches though.
Notes for this scan: Numbering of the files is split per book, it's still off by a few because the covers get inserted in front and I preferred to have the correct number for the correct page as the filename. Also it actually starts from the first page instead of the cover for once. Apart from that same old scanner, so whites are too white and no fiddling with the settings really fixes that. Also the damaged bit of plate which shows up on the side, a - if you will.
This seems to be the only material explaining the worldview of Rance series in its entirety. Hope they make an updated chronicle after the release of Rance 10 and thus the conclusion of the whole series, though I guess there might not be enough interest in that.
Update: I see that there's also a book アリスソフトの今から分かるランスシリーズ -ランス10に向けて- , released before the release of Rance 10, though it says it's aimed at folks new to the series.