"A is Four," well that's more a play on the word 'for' and mostly everything else in the book is about the letter 'A', the fact that it's one of only two single letter words in the English language and all the other bits to go with it. Only this book begins an adventure down the line of letters we use in English to make up the alphabet. Hold on tight then for one awesome, if not unusual adventure into the world of the letter 'A'...