The book "Hybrid Index for Range Approximate Keyword Search on Spatial Database" by Su Nandar Aung provides a comprehensive examination of the challenges and solutions in the field of spatial keyword search in databases. It introduces a hybrid indexing system that integrates both location and text data to enhance the efficiency of answering spatial keyword queries. The author addresses the need for a geo-textual index to minimize the costs of query processing and reduce search times. An innovative algorithm for spatial keyword search is developed, which can also handle typos and inconsistencies in the input keywords. A modified Hamming distance method is employed, allowing for more precise keyword matching without compromising the efficiency of the original method. This specialized book is aimed at researchers and professionals engaged in optimizing database systems and improving search algorithms.