Where Online Can I Have A Book Made?

Sorry if that sounded confusing, but a bunch of people I work with in my organization want to compile letters/notes from each of us into a book for a little girl overseas.
I’m guessing that it would end up being…about 200-400 pages. We would like to add pictures, too!! Preferably 50 or so, in color.
We don’t have a really tight budget, but we were hoping that it would cost less than $300 or so.
The finished result must be an actual bound book. Were not looking to put our notes into a binder or anything sloppy like that. And if possible, we’d like a cover design too.
Any idea where the heck we would go to do this??