"Return on Investment (ROI)" is a comprehensive guide for investors who want to maximize the returns on their investments. The book is authored by Azhar ul Haque Sario, who provides practical insights and perspectives on how investors can evaluate the return on their investments in different areas such as business, real estate, marketing, personal finance, and entrepreneurial ventures.

The book focuses on the significance of ROI in investment analysis and decision-making, and how versatile and applicable it is in a variety of investment scenarios. In addition, the book explores important aspects of investment evaluation that can help investors reduce costs and maximize profits.

One of the key takeaways for readers from this book is to learn how to evaluate their investments effectively and identify areas where they can improve their returns. The book covers different scenarios for private investors, stock market investors, real estate investors, and precious commodities investors.

Furthermore, the book provides in-depth research analysis in different areas such as revenue evaluation, capital investment analysis, advertising effectiveness measurement, sales strategy evaluation, product development profitability assessment, and many more. It also emphasizes the importance of employee training and development, innovation process evaluation, and the impact of legal expenses on investment profitability.