what theme does it discuss?
The depiction of indigenous cultures by Kwee as well as geography and nationalism
Drama dari Krakatau
Thematic analyses have focused on the depiction of indigenous cultures by Kwee (himself ethnic Chinese), as well as geography and nationalism. 
what does drama dari krakatau refer to? A 1929 vernacular Malay novel who wrote it? Kwee Tek Hoay
wiki:24839466
Drama dari Krakatau [SEP] Introduction
Before the final instalment had been published, the novel had already been adapted for the stage. Although Kwee was known as a realist and researched the volcano before writing, "Drama dari Krakatau" is replete with mysticism. Thematic analyses have focused on the depiction of indigenous cultures by Kwee (himself ethnic Chinese), as well as geography and nationalism. As with other works of Chinese Malay literature, the book is not considered part of the Indonesian literary canon.