Complex sentence: In the years to come, though, Adamovich was becoming more and more disillusioned again: these feelings were to some extent reflected in his 1955 book of essays called "Loneliness and Freedom" (Одиночество и свобода).
Split into simpler sentences: In the years to come, though, Adamovich became increasingly more disillusioned again. These feelings were to some extent reflected in his 1955 book of essays called "Loneliness and Freedom" (Одиночество и свобода).