The entire concept of this book is amazing, and it is really funny - but nothing like I expected. Imagine an old man who suddenly discovers new life through a buxom lady - but one whom the family think is after his money. They worry - and have good reason - especially when her relative arrive. Such characters! Why the tractors? It is part of a thesis the old chap is writing, and the short exceprts of this are even interesting in their own right and not boring.
I had the slight feeling the ending was perhaps a little hurried, and the approach to point-of-view was sometimes a little questionable, but such quibbles are purely academic, for the sheer enjoyment outweights them by far. If you want cheering up, just read it! It is one of my favourites.