Is this a mistake?

[irmamar]

Noooo, I can't throw my book away. It's been written by my teacher, who studied in a well-known British University, is a doctor and has written several books about learning English. Now I'm sure that it's a typo, although I think I don't have so much printer's errors in my book :thinking:. I'm not going to discuss if "would had" is widely used somewhere, because I think that such matter may be studied in upper levels, not in mine.

And now, well, I must go on studying. :)

Thank you everybody. :kiss:

[poli]

Here is an example of where would may be followed by had:
I would , had I known. In this case have is implied: I would have, had I known.

[Perikles]

Now I'm sure that it's a typo, although I think I don't have so much printer's errors in my book *cough* many :kiss:

I don't have much time
I have many hours to spare