This isn't on a par with Spike Milligan's "proper" books, nor does it really try to be. What it does do though is provide an interesting and often surprising insight into 'behind the scenes' of Spike's life, and a little peep into the mind of a comic genius with some problems with depression.
Notes, sketches and letters are shown in a very raw form. Some of the handwriting is barely legible (though sometimes typed equivalents are also provided). There are crossings-outs, angry scribblings, and some obvious sadness. There are also some beautiful children's poems and some fantastic jokes.
The material draws more from the 1970s and 1980s, so Goon Show fans might find that all a bit under-represented. At under 250 pages, many of which don't actually contain much, it won't take you a long time to get through.
Don't expect a polished, laugh-a-minute anthology, but this book will still entertain in the way only Spike Milligan knew how.