There are several recommended books and study materials available for the SBI PO Exam, which can help candidates prepare effectively for the exam. These resources cover all the essential topics and provide comprehensive study material to enhance the preparation process.

1. SBI PO Exam Guide: A good SBI PO Exam guide is a must-have resource for candidates. It covers all the sections of the exam, including English Language, Quantitative Aptitude, Reasoning Ability, and General Awareness. The guide provides detailed explanations, practice questions, and previous year's solved papers, making it an ideal study material.

2. SBI PO Previous Year Papers: Solving previous year's question papers gives candidates an insight into the exam pattern, types of questions asked, and difficulty level. It also helps in improving time management skills and identifying weak areas. Many books compile previous year's papers specifically for the SBI PO Exam.

3. SBI PO Descriptive Paper Guide: The SBI PO Exam includes a descriptive paper that tests candidates' writing skills. A guide specifically designed for the descriptive paper helps candidates understand the format, structure, and types of questions asked in this section. It also provides tips and strategies to write effectively.

4. General Awareness Books: For the General Awareness section, candidates can refer to books that cover current affairs, banking awareness, and general knowledge. These books provide information on important events, government schemes, economic developments, and banking-related topics.

5. Reasoning Ability and Quantitative Aptitude Books: Several books are available in the market that focus on reasoning and quantitative aptitude topics. These books cover various concepts, shortcuts, and practice questions to help candidates improve their problem-solving abilities.

6. English Language Books: To improve English language skills, candidates can refer to books that cover grammar rules, vocabulary, comprehension, and sentence formation. These books also provide practice exercises and sample papers to enhance proficiency in English.

7. Online Practice Tests: Apart from books, candidates can also take advantage of online practice tests and mock exams. These tests simulate the actual exam environment and help candidates assess their preparation level. Many websites offer free and paid practice tests for the SBI PO Exam.

Remember, while selecting study materials, it is important to choose reliable and reputed sources to ensure accurate and up-to-date content.