Frankenplot

Who wants to play "Frankenplot"?

This is an excellent game to play with your well-read friends (if you have any). It's also a great way to stumble across new and interesting plot combinations for your own work.

Here's how to play:

I have mixed up the plots of THREE novels by world famous authors. All you have to do is GUESS which three novels I have used to create this new "Frankenplot". I have tried to make this first one a humorous combination (and that is the only hint you get). If you like, post your own Frankenplots in the comments for others to guess as well.

If anyone here CORRECTLY identifies the three novels I have used for this Frankenplot before Feburary 1st (the anniversary of Mary Shelley's death), I will donate $25 to ABCtales. 

If you cheat, you have to match my donation (just kidding, please don't cheat).

Here's my Frankenplot:

"Three friends who are convinced they are dying of every disease known to man decide that a boating holiday up the river will cure them. They pack far too much luggage, argue constantly about who is doing the most work, and cannot figure out how to open a tin of pineapple. At a riverside inn, one of them goes under anaesthetic at the dentist and wakes up in the body of a child. His companions do not believe him... they assume he has been drinking and continue upstream without much concern, dragging the child along and feeding him cold sandwiches. When they finally reach the gloomy farm of a distant relative, they find the household paralyzed by an elderly woman who has not left her bedroom in twenty years because she once 'saw something nasty in the woodshed.' The friend trapped in the child's body is immediately put to work tidying up the family's various romantic entanglements, which he does with surprising efficiency, while his original adult body (now occupied by an actual child) has been punching people up and down the riverbank. By the time things are sorted out, it has begun to rain, and they abandon the whole enterprise and take the train home."

What three novels am I combining?