“This book is an impressive undertaking in its breadth, depth, and insight that readers will look to as a state-of-the-art source on the synthesis of theoretical and empirical studies of reflexive pronouns. … As researchers, we find this book most up-to-date, well-organized, thought-provoking, and extremely useful to serve as a theoretical framework for empirical studies in areas of language acquisition … . we would like to highly recommend it to anyone who is interested in the relevant research mentioned above.” (Li Zeng, Hao Lin and Xinmin Zheng, Frontiers in Psychology, frontiersin.org, March 24, 2021)