This book, called “Caution! Harmful Products,” went through 11 reprints, which is a record in book publishing in modern Russia. In Russia, “Caution! Harmful Products" was published under the pseudonym "Mikhail Efremov" and, for censorship reasons, only in a truncated form. It is the text of this book that has been “pulled” across numerous sites on the Internet: both the full text, and in pieces, and in chapters, as a rule, without even indicating the source and name of the author. A more or less complete version and under the real name of the author - Sergei Nikitin, the book was published only in the Czech Republic. Now you have before you the complete, author's text of the book, without exceptions or cuts. Regular citation is allowed, indicating the source and the name of the author "Sergei Nikitin". It is prohibited to post on the Internet in whole or in part without the written permission of the author of the book. Due to the fact that related rights have expired (as of 2008), and all rights to the book belong to the author, it is possible to consider a proposal to publish it in “paper” form.< /p>