The novel "The Zrinjski-Frankopan Conspiracy" (1893) was the most widely read Croatian book for ten years, and, thanks to the interest of readers at the time in historical events, it had a huge influence on younger generations of readers.
In Boll's novels, one of the central themes is the attempt to preserve basic moral values in a time of terror, as well as in a period of material prosperity and corruption.
The sequel to the ultimate hit Sex Scandal: Confessions of a Zagreb Model, Sex Scandal 2: Politicians in Bed, exposes the moral underbelly of Croatian politicians who publicly act as selfless fighters for the common good, while privately indulging in lust