I own both Houghton + (Brock / Caruthers / Carpenter - depending upon edition) and Clancy and whilst I think the Houghton book is far better in it's latest edition I still think Clancy is far clearer with less maths purely for the sake of it.
That said, at least 3 generations of aeronautical Engineers have grown up with Houghton, so it can't be that bad.
G