If you are interested in more type/function descriptions:
Marie-Louise von Franz has descriptions of the 8 functions (types). You can find them in the book "Lectures on Jung's typology"
It's Jungian so the perspective is maybe slightly different. Lot's of experiences from clients in analysis etc. But her descriptions are definitely a great complement to socionics/Jung descriptions.
She also gives specific attention to the suggestive ("inferior") function. Pretty interesting stuff there.
I'm still reading it. Lot's of things to digest.
You can buy the e-book here.
EDIT: von Franz is one of the most well-known Jungian analysts and authors. And also a really interesting person.