Over-the-shoulder has hidden problems

In the over-the-shoulder style of bridge literature, the author describes his thoughts as he plays through a deal. The danger is that the writer will be constantly patting himself on the back for his great plays and defences. Frank Stewart in Play Bridge

With Me (Baron Barclay) pulls it off because his deals are instructive. In today’s deal, how should South play in four hearts? West leads the diamond 10. East wins with his ace and returns a diamond to dummy’s queen. Stewart (South) began with one heart because he did not want to face the rebid if he opened one club, and partner responded one spade. (One no-trump would have been a big underbid, two hearts a bit of an overbid.) North then had an awkward response, unsure what his minor-suit queens were worth. He compromised by bidding one spade, then showing game-invitational values in hearts, which implied only three-card support. South could afford one trump loser, not two. That would usually have involved playing East for the ace. Declarer was just about to plunge forward when he realized that, since he had two club entries on the board, he could afford to make a discovery play first. At trick three, he led the spade king. When East won with the ace, West was marked with the heart ace — why? East passed as dealer, but was known to have started with the spade ace and diamond ace-jack. Now the only chance was to find East with the heart 10 and jack by running the heart eight from the board.