A very useful package of 2 CDs and book that cover most, if not all, the birds of Britain.
The book describes the birds calls and if they are on the CDs, as most are, a track number is given.
There are a few birds missing from the CDs, which is a shame, but the 2 disks are full.
A number of birds of prey are missing, and a few Warblers are not included, but maybe they will turn up on Geoff Samples next book/CD that deals just with them.
Other than that, having loads of birds on CD is very useful, as you can skip through tracks with easy.
The recording quality is very good, and with a whispering voice by Geoff telling you what bird is what, it feels like you are there in the field.
Its very relaxing too !