This is by far the hardest for a long time. With such arbitrary themed clues, there's little in the way of a crossword element to it.
However, I have now finished it all except for 3,15. I have the author, and an idea for the title. As it is, I don't even know how to ask for hints. I assume the first six letters are the building, and then I have an anagram of one word in the clue, and a synonym for the same word. And no idea where the piglet comes in. Help, please ...