The yarn is Rio de la Plata Merino Sock (it's so new that it isn't on the website yet.). It is super yummy. Rio de la Plata is much like Malabrigo and Manos - kettle dyed, great colors. It looks like a really nice sock yarn - I can't wait to try it out. We only had three colors at the store, but we have more on order. I'll try to restrain myself.
The bok is Ella Rae book seven, which contains patterns for their summer blend yarn Silkience. I haven't tried the yarn yet, but it looks and feels really nice in the skein. The book is great, with several patterns I can see myself making. My favorites are:
One or more of these will be jumping on the needles soon, as soon as something else gets finished around here!