i have the 1976 paperback true first printing of star wars from the adventures of Luke Skywalker with the pre viz artwork by Ralph McQuarrie signed by the true author alan dean foster, i love mr fosters work.

the later printings still have not been changed even though lucas in a foreward written for the 1995 hardback
edition he admits foster authored it.

that makes the very first 2 star wars novels published the work of Alan Dean Foster, the sequel novel Splinter of the Mind's Eye was also penned by him.