Needless to say, this was the toughest part of the tag. Any bookworm would have trouble answering this, because for one thing, it's next to impossible to have just one favourite, and the second thing - what defines the "favourite book of all time"? Is it merely good writing? Is it its ability to stay fresh and appealing every time you come back to it? Is it good illustration? Or is it depth beyond the words, a heavier meaning that you need to analyse and realise the beauty of?
It was incredibly tough choosing Lewis Carroll's Alice's Adventures in Wonderland and Through The Looking Glass, but in the end, it seems to match all of those conditions. And much more, besides.
I glossed over much-beloved books like Frankenstein, Love In The Time Of Cholera, The Irresistible Inheritance Of Wilberforce, and the more recent favourite The Buddha Of Suburbia.
I've read these books countless times, as a child when I read them merely as stories, as an English Literature student when I analysed them, and as an ordinary adult who enjoyed the beauty of the writing and the illustrations, and the hidden jokes and deeper meaning.
It will always be my "favourite book of all time".