Official publisher sites like AST often provide free chapters or excerpts .
Searching for a way to download Sergey Lukyanenko's Watch ( Dozor ) series for free in FB2 format usually leads to unofficial sites, as the books are under copyright. However, there are official and legal ways to access the series digitally through major Russian retailers and subscription services. Where to Access Lukyanenko’s Watch Series
Дозор» (2003) «Последний Дозор» (2005) «Новый Дозор» (2012) «Шестой Дозор» (2014) Издательство АСТ
document: Дозор · Печать Сумрака // Сергей Лукьяненко; 1 — Ночной Дозор // Эрдейский поход // Руслан Мельников; 2 — Дневной дозор Миры Фэнтези Nightwatch : Lukyanenko, Sergei - Internet Archive
You may find digital copies for borrowing through the Internet Archive or regional digital library systems . Reading Order for the Main Series