Most rituals I have heard about for inviting fae in involve fruit, flowers, or some other offering. Certain trees or natural formations are said to be hangouts for fae... like oak trees, riversides, and the infamous "faery circle" of mushrooms (if I remember correctly). They are also known to be very tricky or spiteful, so tread with caution. Hopefully someone else can chime in with some good book resources, as I don't own or know of any specifically.
I found this: