The monograph “Marine and Brackish-Water Gastropods of Russia and Adjacent Countries: Illustrated Catalog” is available for reading and downloading on the IEE RAS website. The authors of the monograph are Yu. I. Kantor and A. V. Sysoev.
This is the first and so far the only complete illustrated catalog of marine and brackish-water gastropods of the fauna of Russia and the former USSR. The fauna in question consists of 1,240 species-level taxa, 350 genera, and 110 families of Gastropoda. For each species, references are provided to the original description, synonymy, type locality, information on types, and data on distribution in the specified region. Illustrations, mostly color photographs, are provided for 1,154 species. Preference is given to type specimens for species described from the territory in question. For other species, specimens on which the findings were based are used. The bibliography includes 790 titles. The text is completely bilingual (Russian and English).
You can download the monograph from the link.