Answer:
A large oasis in the desert. Come with cash and leave with none. What am I?
u always follow me but I am rarely seen
*forward* *backwards*is what I do all day. I come in all different shapes and sizes. I can be scary and I can calm you down.
I am in the middle of water but am not an island.
I wiggle and cannot see; sometimes underground and sometimes on a tree. I really don't want to be on a hook and I become a person when combined with “book”.
When someone uses this acronym, you know you've got to pick up the pace