This is a Japanese (or English) language manga (comic) or a magazine featuring multiple manga series.
From Comickers comes this softcover volume packed with doujin-makin' know-how! How to produce doujin websites (keitai-version sites too), CD-ROMs, and good old-fashioned paper publications, both offset and copy, are covered, as is the process of selling at doujinshi events. All text is in Japanese. 112 pages (92 in color).