Siri misi 909 - Umarul Hakim (Kuala Lumpur : Arus Intelek, 2000)
jilid 1. Operasi halimunan - jilid 2. Operasi great white shark - jilid 3. Operasi tinta - jilid 4. Operasi kurita - jilid 5. Operasi tiram
Keywords: Young adult fiction, Malay; Malay fiction; Science fiction, Malay