I agree Loubyloo - also found this quite hard, and still stuck on a few at the top. Not got the spoonersim yet, nor the second word of the children's novel. Looking for some kind of anagram for that, but not seeing anything. Hints would be welcome!
Had to put the crossers of 27a into crossword solver - also would never have got it otherwise.
COD (so far!) is 25a.