I have a suspicion that more progress is made by scientists prepared to posit "ridiculous" theories, than by scientists loyal to the straight and narrow. Aren't all the best science stories about rebels against an orthodoxy? It's what scientists are supposed to do.
And sleep is such an interesting place, twinned with imagination. The book is Why We Sleep: The New Science of Sleep and Dreams (Allen Lane), and yes, that is me ahead of you in the queue outside the booksh- no, let's make it the Falmouth Bookseller, with a red carpet outside.
Carry on dreaming; it's just like being awake, isn't it? Except for those elephants.