The monograph by E. Deaner «The electronic book as a bibliological object» [«Elektronnaya kniga kak kategoriya knigovedeniya», 2017, in Russian] is analyzed. The monograph logically extends the previous book by the same author published in 2016, namely “Theoretical and methodological foundations of digital books as a bibliological category” [«Teoretikometodologicheskiye osnovy elektronnoy knigi kak kategorii knigovedeniya», in Russian].  The monograph is seen as a radical breakthrough in the modern Russian bibliology, as it tends to reconcile the traditional bibliology and new information technologies on which e-publishing and book distribution are based today. The author demonstrates that digital books completely matches the theoretical and practical provisions of bibliology and documentology being specific type of the document rather than a specific genre. The digital books can be blended seamlessly into the book culture phenomenon, to enrich it with a radically new and innovative object.  The high appraisal is given to the methodological approaches toward defining the concept of the digital book and its representation within the book communication system. The principle of the digital book ergonomics is examined in detail and is positively appraised, as well as the principle main factors, i.e.: the material, semantic, signatury, syntactic, pragmatic and temporal elements.

The monograph content would enable to liven up the academic courses in bibliology and documentology. The librarians in collection development and digital collection development and bibliographers will make the readership of the monograph.