Unseen it may be, but it will not now be unheard. Tantor Audio has just published an audio edition of The Forest Unseen, narrated by Michael Healy. I have not yet listened to the whole reading, but the parts that I’ve heard are great.
You can hear a sample, buy the CDs or mp3s, and hear some clips from the woods on Tantor’s website.
Cover art for the CD case, with Buck Butler’s great photo making another appearance: