British publisher Penguin has launched a Web-based, collaborative novel that can be written, edited or read by anyone, anywhere thanks to “wiki” software, the technology behind Web encyclopedia Wikipedia. The novel, “A Million Penguins,” went live on Thursday and its first lines are already being written, edited and rewritten by enthusiasts. Penguin, which embarked on the project with a group of creative writing and new media students, says it is using the novel as a test of whether a group of disparate and diverse people can create a “believable fictional voice.”