Yes, it's a just link to an excellent book on virtual communication.

I highly recommend this book for all the remote workers, office workers, and the rest of us for professional virtual communication authored by a well-known researcher in the field that spent decades on the topic. Fun facts, he even interviewed and include quotations from David Heinemeier Hansson of the RoR fame, regarding open source movement where according to him virtual communication has been the default since the very beginning.