Regarding the hundreds of books in ZUN's workshop shown in the programme, Ruw
said that these are only a tenth of the books in the room; ZUN also has other rooms for books.
A lot of the books seen in the video are reference books on wide-ranging topics, including mushrooms. Plenty of books on Japanese folklore and village culture.
My friend sent us another update. Of the two monitors he use to work, the smaller one on the left is Mitsubishi MDT231WG (23-inch), and the bigger one on the right is Eizo FlexScan S2410W (24-inch). Both are expensive professional grade monitors, now discontinued.
You can of course, still see his trusty Edirol SD-90 Sound Canvas synthesizer by his side, the source of the ZUNpet sound.