godan verb (-su)
publish a book; write and publish
Used specifically for publishing a book one has written; implies both the writing and the act of making it public.
彼は昨年、初めての小説を書き著した。
He published his first novel last year.
Compound of 書き (kaki, continuative form of 書く 'to write') and 著す (arawasu, 'to publish/write a book'). The exact historical derivation is uncertain, but the combination reinforces the idea of writing and publishing.