This publication is a valuable and rigorous scientific work of a very high academic standard and considerable practical utylity. Its structure follows both the established tradition of floristic studies and the contemporary standards of scientific publication, succesfully combining a strong reference function with practical application. The authors draw on current phylogenetic classification systems and modern taxonomic standards while retaining links to classical systematic approaches. This provides a smooth transition between historical and contemporary perspectives and effectively integrates traditional floristic knowledge with modern molecural systematics. The book represents an important contribution to research on the flora of the Southern Baltic Sea and a valuable resource for researchers and students working in aquatic plant taxonomy and ecology. Its greatest strenght are its precision, up-to-date approach and methodological consistency, combined with substantial scientific, practical and educational value.