Frigyes Karinthy's Skull-Journey & Esperanto

This book by Frigyes Karinthy looks like a great read:

'A Journey Round My Skull' by Frigyes Karinthy

And note this sentence:

"This funny-peculiar book from an author whose extraordinarily diverse career spanned Swiftian satires, a translation of Winnie the Pooh, a short story entitled ‘Chains’ in which he proposed the idea of ‘six degrees of separation’, and the presidency of the Hungarian Esperanto society, may indeed relish its distortions and comic incongruities (it was advertised using Karinthy’s own slogan — ‘The Newest Novel of the Famed Tumorist’)."