Since these are older titles, you typically won't find them on modern "free download" sites without running into spam or broken links. Your best bet is to look for physical copies or digital scans on:
Новичок на Рыбалке Радзинский - OZON kniga novichok na rybalke rozinskii skachat besplatno
Some editions, like Uroki Rybolovu-Novichku , use a conversational style between a beginner and an experienced angler, making the technical advice easier to digest. Since these are older titles, you typically won't
Rozinsky also wrote a dedicated follow-up, Novichok na Zimney Rybalke (Novice at Winter Fishing), which is highly regarded for its focus on ice fishing nuances like using mormyshkas and lures. Where to Find It Since these are older titles
Rare book dealers like Bukinist often stock these Soviet-era editions.