open letter addressed to “Mickey,” Foster said he’s owed royalties for his 1976 book version of the first “Star Wars” film, which he ghost-wrote for series creator George Lucas, and the 1978 sequel “Splinter of the Mind’s Eye.” He’s also missing fees for his trio of novels based on the hit “Alien” films, which became Disney’s after it acquired 20th Century Fox last year, he said.“When one company buys another, they acquire its liabilities as well as its assets.