These books are stored inside the shelfs at Agastya Base, a prison located in outer space directly above the Southern Base.

Himitsu Sentai Gorenger

JAKQ Dengekitai

Battle Fever J

Denshi Sentai Denziman

Taiyo Sentai Sun Vulcan

Dai Sentai Goggle V

Kagaku Sentai Dynaman

Choudenshi Bioman

Dengeki Sentai Changeman

Choushinsei Flashman

Hikari Sentai Maskman

Choujuu Sentai Liveman

Kousoku Sentai Turboranger

Chikyuu Sentai Fiveman

Choujin Sentai Jetman

Kyoryu Sentai Zyuranger

Gosei Sentai Dairanger

Ninja Sentai Kakuranger

Chouriki Sentai Ohranger

Gekisou Sentai Carranger

Source: https://twitter.com/Martian_Ranger/status/1483152391042121732?t=9XhVhx5GPA92SRpyBiLiZA&s=19