The existing e-books allow only authors to provide information or contents to people, but they do not allow people to participate in making contents in the e-books. However, in some books including observation diary and experiment diary, people need to write down some contents or information in the books, and keep and manage the contents. In this paper, we propose a new kind of e-book concept, in which people can participate in making e-book and add new text, pictures taken by camera builtin the e-book reader systems, and other information such as sensor data to the published e-books. We draw some requirements for the e-book and introduce its system architecture and its document format. The document should include "placeholder" for contents created by people and "trigger" for activating people's participation. We also introduce our prototype system, which allows people to add camera pictures and sensor data to the published e-books. We adopt HTML5 and Web technologies to build the prototype because those technologies have advantages such as ease of implementation, extensibility, and compatibility. Our work is very meaningful in e-book research because we introduce a new concept of e-book, people participating e-book, and we show the e-book systems direction by showing the possibility of HTML5 based e-book system.