Charles Martin Shaeffer is a fictional character in Larry Niven's Known Space universe. His nickname is "Little" Shaeffer and is known to most of his friends simply as "Lit".
A Belter, born in the late 21st century, he is First Speaker for the Belt Political Section when Kzanol the thrint is revived from stasis in the early 22nd century. He is friends with Lucas Garner and has visited with him at least once on Farmer's Asteroid, one of the Belt Bubbleworlds. Lit's nickname comes from the fact that he spent a good deal of time in low and zero-g during his body's growth period, and is now unusually tall.
The Shaeffer family is very active in Belt politics, and are likely ancestors of Beowulf Shaeffer, but this is never established definitively.
Lit Shaeffer is featured in the novels:
and in the short story: