I'm writing a third edition of Security Engineering, which will be published in November 2020.

With both the first edition in 2001 and the second edition in 2008, I put six chapters online for free at once, then added the others four years after publication. For the third edition, I negotiated an agreement with the publishers to put the chapters online for review as I wrote them. So the book came out by instalments, like Dickens' novels, from April 2019 to Septamber 2020. On the first of November 2020, all except seven sample chapters will disappear for a period of 42 months. I'm afraid the publishers insist on that. But therearefter the whole book will be free online forever.

You may pre-order the paper book here for delivery at the end of November in the USA and here for delivery in January 2021 in the UK.