I am listing down a few i have ( some of them are surely outdated but useful to read) and feel it will be more constructive.
English works ( chronology history related)
Pallavas - .G.J . Dubreuil Pallava Antiquties - Gabriel Jouveau-Dubreuil, V. S. Svaminadha Dikshita Studies in Pallava Histroy - H. Heras. Inscriptions Of The Pallavas - T V Mahalingam
Art & Architecture related
Cave Temples of the Pallavas - K. R. Srinivasan Pallava Architecure - Alexander Rea Pallava Sculpture - Dr. R. Rajeshwari Pallava Rock Architecture & Sculpture - Elisabeth Beck Pallava Art - Dr Gift Siromoney and Michael Lockwood
Tamil works: ( historical)
Pallavar Varalaaru - Dr. Rasamanikanar. There are a host of books of Sri Mylai Seeni venkatswamy.
Art , architecture
Adhyandha kamam(dharma raja radham of kadalmallai) - Dr.Kalaikovan Mahendhirar kudaivaraigal - Dr.Kalaikovan