Sorry to have missed this one. There are two booklets, the first was published by Birdwatch magazine and was basically a compilation of the 10 or so articles I had written for Birdwatch magazine.
The second was published by Birdwatching magazine last summer and consisted of a number of articles by myself but contained articles by Katie and a couple of other Birdwatch mag regulars. Both booklets sponsored by Nikon, so don't go expecting much about other cameras in them.
I have a number of the latter booklets but very few of the orginal Birdwatch booklet left.