This book surveys all the Soviet/ Russian aircraft that either remained 'paper projects' (the work progressed no further than the design documents or even merely a design proposal) or were abandoned at the prototype construction stage. Over many years the authors have unearthed a mass of unpublished material on these aircraft projects. These include such aircraft as the Isayev/ Shevchenko 'bi-monoplane' fighters with retractable lower wings developed in the 1930s early Soviet jet fighter projects of the Second World War period the twin-boom fighters & attack aircraft developed by Semyon M. Alekseyev in the late 1940s Aleksandr S. Yakovlev's high-altitude 'balloon killer' fighters developed in the mid-1950s specifically for use against NATO reconnaissance balloons the jet fighters of the Antonov design bureau which specialised primarily in transports & airliners the various unbuilt fighter & bomber projects of Artyom I. Mikoyan Pavel O. Sukhoi Vladimir M. Myasishchev & Roberto Bartini. Wherever possible images of the aircraft are shown including pictures of models line & cutaway drawings from the project documents giving the readers the maximum available information on Soviet aircraft projects developed over a large time scale. The book is richly illustrated with numerous photos drawings & diagrams as well as colour side views of the unbuilt aircraft which will be of interest not only to the numerous Soviet/ Russian aviation enthusiasts but also to scale modellers.