The book \\\"Havanvidhi - Havan Ke Mantra\\\" (हवनविधि - हवन के मंत्र) by Shridhar Shastri and published by Shastri Prakashan, Prayagraj, is a popular ritualistic guide for performing the Hindu fire ceremony known as Havan or Homa.\\r\\n\\r\\nThis manual is specifically designed for people who frequently perform Havan and need a comprehensive, yet easy-to-use reference for the complete ritual.\\r\\n\\r\\nKey Features and Content\\r\\nAuthor and Publisher: The book is authored by Shridhar Shastri and published by Shastri Prakashan.\\r\\n\\r\\nLanguage: It is written in a combination of Sanskrit and Hindi.\\r\\n\\r\\nFocus on Mantras: The primary purpose is to provide a vast collection of mantras for making oblations (āhutis) into the sacrificial fire.\\r\\n\\r\\nComprehensive Deities List: A notable feature is the inclusion of the names of at least 500 deities, organized with the correct Swāhākār (the \\\'Svaha\\\' chant) for offering to each one. This makes it suitable for various types of Havans.\\r\\n\\r\\nHavan Methods: The book is reported to include the methods for several specialized Havans, such as the Vāśiṣṭhī Havan Paddhati and procedures for Gṛha Shānti (peace for the home).\\r\\n\\r\\nTarget Audience: It is aimed at Karmakandis (priests) and devout followers who perform large-scale or multiple Havans throughout the year, ensuring all rites are completed correctly from a single source.\\r\\n\\r\\nFormat: It is typically a compact, paperback book, often around 80 pages.