A
first contact book, by
Alan Dean Foster. (My favorite first-contact books, actually). In it, you can find the first seeds to the
Humanx Commonwealth, where
human and
thranx united.
In brief, it tells of Ryozenzuzex, and his aimless drift though thranx society. Unlike the rest of his insect-like brethren, he cannot find satifaction in his work. He is too much of a dreamer. And when he stumbles upon a group of humans as they escape from a thranx research lab, he life is changed forever.