1. Efendioğlu, İH & Durmaz, Y (2020). The Triangle of Social Media, Advertising, and Brands, İstanbul: Hiperlink Yayınevi

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2. Efendioğlu, İ.H (2020).Personal Factors Affecting Consumer Behavior, Y. Durmaz (Ed.). Consumer Behavior (pp. 157-171). Nobel Kitap

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3. Efendioğlu, İ.H (2020). Digital Marketing. Y. Durmaz. (Ed.) Principles of Marketing (pp. 249- 288). Seçkin Yayınevi

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4. Efendioğlu, İ.H (2020). The Rise of Relationship Marketing in Consumer Behavior, D. Karaman (Ed.) Consumer Behavior I: Current Academic Studies (pp.144-167 ). Eğitim Yayınevi

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5. Efendioğlu, İ.H (2021). Content Marketing, F. Çayırağası (Ed.) Current Digital Marketing Paradigms (163-181). Nobel Yayın

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6. Efendioğlu, İ.H. (2022). Conversational Marketing, M. Yücenurşen (Ed). International Research in Social Sciences, Humanities, and Administrative Sciences XIV (145-153). Eğitim Yayınevi

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7. Efendioğlu, İ.H. (2022). Management Information Systems and Türkiye: Digital Transformation in Marketing, B. Akkoyun (Ed). The Industrial Process of Technology in Strategic Business Management (327-346) Eğitim Yayınevi

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8. Efendioglu, I.H. (2022). What Is the Difference Between AR, VR, MR, and XR? Augmented Reality Marketing and Applications. S. İpek, C. Kılıç, S. S. Tan (Ed. ), Current Research in Social Sciences II (88-98). Ekin Yayınevi

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9. Efendioğlu, İ.H. (2022). Fear of Missing Out (FoMO). F.Şahin and R. Bahar (Ed). Macro Trends in Consumer Behavior (425-446) Nobel Yayınevi

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10. Efendioğlu, İ.H. (2022).Metaverse Platforms, Metaverse Games, and Businesses Entering the Metaverse. A.Güven and M.S. Tam (Ed). The Alternative Digital Universe: Metaverse I (3-34). Necmettin Erbakan University Press

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11. Efendioglu, İ.H. (2022). Digital Human Resources Marketing and Search Engine Optimization Expertise. Ç. Demir, B. Göktaş (Ed. ), Digital Human Resources Marketing (pp. 415-433). Efe Akademi Yayınevi

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12.  Efendioğlu, İ.H. (2022). What Is the Metaverse? Marketing in the Metaverse World, Y. A. Ünvan, R. İnan (Ed.), Research in Economics, Administrative Sciences, and Social Sciences (pp. 133-149). Livre De Lyon

​13. Efendioglu, İ.H. (2023). Metaverse Concepts and Marketing. Pantea Keikhosrokiani (Ed.). Consumer Behavioral Analytics in Metaverse and the Adoption of a Virtual World. (p. 224-252). IGI Global

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14. Ozkan, B., Efendioglu, I.H., Baran, T., Koc, F. (2024). The Effects of Perceived Price, Quality, and Consumer Trust on Purchase Intentions of Halal Products. In: Fraedrich, J., Pirtskalava, M., Khoshtaria, T., Terzi, H., Bayirli, M., Al Serhan, B. (eds) Contemporary Business Research in the Islamic World. GIMAC 2023. Springer Proceedings in Business and Economics. Springer, Singapore. https://doi.org/10.1007/978-981-97-5400-7_3​​​​​​​​​​​​​​​​​

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15. Balcı İzgi, B. and Efendioğlu, İ.H. (Ed.). (2025). Artificial Intelligence Applications: Sectoral Impacts and the Consumer in the Age of Digitalization. Gazi Kitabevi

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16.Efendioğlu, İ. H. (2025). The Commercialization of Consumer Data and Digital Ethics. B. Balcı İzgi and İ. H. Efendioğlu (Ed.), Artificial Intelligence Applications: Sectoral Impacts and the Consumer in the Age of Digitalization (pp. 11–36). Gazi Kitabevi.

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17. Efendioğlu, İ. H. (2025). Conversational marketing with AI-powered chatbots: A comprehensive bibliometric analysis. M. Dal and İ. Ay (Ed.), Bibliometric Analysis IV (pp. 13–39). Akademisyen Kitabevi AŞ. https://doi.org/10.37609/akya.4021.c3286

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18. Efendioğlu, İ. H. (2025). Metaverse marketing and consumer dynamics: A new era of virtual interaction. M. Dal and İ. Ay (Ed.), Bibliometric Analysis IV (pp. 63–96). Akademisyen Kitabevi AŞ. https://doi.org/10.37609/akya.4021.c3288