I’m technically looking for a series, but I can describe a few key events within the series. Also, this was available around the time I was in middle school, 07-08ish. 1. The main character, who is a young medium (think maybe 13 or younger), realizes that her new friend is dead and he has to accept that as well. 2. She leads some child ghosts to an Alice in Wonderland statue that winks due to a trick of the light, and it somehow persuaded the children to move on, much to the annoyance of her deceased brother later when they arrive 3. She visits some center that prepares people for the afterlife. One of the ways they do this is by having them rehearse their death. She, as a medium, isn’t even supposed to be there and it’s somehow dangerous for her to be present.