Screencap of the oreilly website with "Purchase book" listed under the Resources section in small type.
https://media.infosec.exchange/infosec.exchange/media_attachments/files/114/388/494/722/655/975/original/5f339f5f27c05add.png
Holy shit, dark patterns. At the very bottom of the page "Purchase book" in small font.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.