Sturgeon was best known as a short story writer, although he wrote some well received novels, such as More Than Human, The Dreaming Jewels, and the under-appreciated Some of Your Blood.
Outside of science fiction and fantasy he’s probably best known for what has come to be called Sturgeon’s Law: 90% of everything is crap.
I really like Sturgeon’s short fiction, especially his early work. There’s a level of craftsmanship and fun that some of his later works, such as “If All Men Were Brothers, Would You Let One Marry Your Sister?” lack. Skip that story and go to “It” or “Mewhu’s Jet” or “Yesterday Was Monday.
His first collection was entitled Without Sorcery, which was something of a misnomer since much of it was fantasy. It was reprinted by Ballantine under the title Not Without Sorcery and is an excellent introduction to his work.
There was an attempt in the late 90s and 00s to collect all of Sturgeon’s short fiction between hardcovers. I think I’m missing the last of that set. But if you get a chance, read some of his work. It’s worth seeking out.