Little Fuzzy (1962) by H Beam Piper
The Other Human Race (1964) by H Beam Piper
     aka Fuzzy Sapiens
The Fuzzy Papers (1979) by H Beam Piper
Fuzzy Bones (1981) by William Tuning
Fuzzy Papers / Fuzzy Sapiens (omnibus) (1981) by H Beam Piper
Golden Dream: A Fuzzy Odyssey (1982) by Ardath Mayhar
The Adventures of Little Fuzzy (1983) by H Beam Piper
Fuzzies and Other People (1984) by H Beam Piper
The Complete Fuzzy (1995) by H Beam Piper