Really anything, I o ow a little bit about spirits, but I'm mostly looking for information about anything involving spirits. Whether it's to summon them, what they are, how to get rid of them, anything.
You know there are many websites, articles, videos, and books on a wide assortment of spirits from many cultures and traditions. Instead of asking everyone for very broad and general information, maybe you could be more specific on the kind of infomation you are asking us to help provide you. Or you can continue on your way and pick up a book and start reading about a particular spirit or type oh spirit.
The best way to get the most accurate advice is to ask your questions as thorough and as specific as possible. The Enyclopedia of Spirits mentioned earlier is by Judika Illes, she is an author I would recommend but always verify and cross reference what you read.