There are many books on the subject of unreliable narrators. Such books are within the science of Al-Jarh wal-Ta'deel. Famous books among Sunni sects are Kitab Al-Dhu'faa' Al- Kabeer by Al-Oqaili,
Al-Dhu'faa Al-Sagheer by al-Bukhari,
al-Kaamil fil Dhu'afaa by Ibn Oday Al-Jarjaani.
You can also refer to Shia books like Al-Ghadeer to read about famous narrators who used to lie and fabricate narrations to serve the purpose of the rulers who were enemies of Ahlul bayt (AS).