詞人潘源良一生浪子生涯，無打過長工，前《壹週刊》副總編輯余家強以訪談形式記錄，配以潘源良撰寫回應文章，爬梳交織出一生傳記。本書側記了香港流行工業興衰史，細說不同流行行業，如電台、音樂、電影等幕後運作，讀者除了可認識潘源良，更可了解到香港文化工業背後的脈絡。 本書同時收錄多張珍貴圖片，以及潘源良未曾發表的詞作，別具收藏價值。

Written and interviewed by Yue Ka Keung,《為光音作證–潘源良香港誌記》is a biography of Calvin Poon Yuen Leung, one of the most renowned lyricist in Hong Kong. His footloose life and years of works in music not only provides readers a glimpse of his legacy but also the history of Hong Kong pop culture and entertainment industry. From radio, music to TV shows, the book unearths many of the unseen precious photos, manuscripts and notes which are distinctively collectable for Hong Kong Cantopop lovers.