The document outlines the new circular issued by SEBI regarding the electronic book mechanism for private placement of debt securities. It allows for issues with a single investor, fixed coupon rates, and less than Rs. 500 crores to use an electronic book provided by a recognized stock exchange. The electronic book will allow issuers, arrangers, sub-arrangers, and institutional investors to participate in the private placement process online through a bidding portal managed by the electronic book provider according to set procedures.