I started finishing the illustrations for another book I shelved for a long time. This turned out to be a good thing. I will be able to send this book to an editor soon. This still did not remedy the problem I was having with Seefer, though.
Then one magical thing happened this week. I mowed the lawn. No writing. No drawing. No anything related to books. I just started up the tractor and cut some grass. About 15 minutes in, I had a Eureka! moment. The missing hook, the essential element, that I had been beating myself up to find came right into my head. Maybe it was the excessive vibrations. Maybe it was the smell of the freshly cut blades tickling my nostrils. Maybe it was my mind being focused on something else entirely. I don't understand the science about it. Whatever it was, I'm glad I mowed the grass that day.
From this, I draw one important conclusion. Mowing your lawn may be the cure for writer's block.