What method of deciphering to you use? I cross my eyes, the slowly Uncross them as I look at the image. It's important to never totally focus on one spot.
I always loved these books. Such a strange phenomenon that I could never figure out how it works.
I feel bad for my 5 year old boy. I keep getting him more of these books when I find them at thrift stores. He gets so frustrated, but keeps on trying. I wish that I could explain it to him effectively. I figure he will just get it one day. 
It's a schooner 
Stupid facks, it's a beer glass.
I have one eye and I can see them. I remember the sensation was completely different when I had two eye. I can see them now but it isn't the same as before.
OP: I love the juxtaposition of your screen name and the subject matter here. Bravo.
That said, isn't it a bit sadistic to keep buying your kid books he can't "get"?
"Here's another book with pictures you can't see, son. What a shame. This is a particularly good one, not that it matters to you. By the way, supper's in ten minutes: we're having all the foods you're allergic to."
^Hah! The way you describe it would be sadistic. I have an entire library for my son, though. He looks forward to me reading a wide variety of books to him. There are about a half dozen magic eye books. So, not as sadistic as you think. Also, I couldn't do them when I was 5 and I tell him that.
Thread needs Seinfeld gifs
You're really missing out if you can't see them!
I have never ever been able to do them. I'm color blind though (red-green deficiency) and suck at the Ishihara test. Not sure if the two are correlated.
I've never been able to get them to work either.
I can see them instantly. I could see the books ones before i even turned the page completely
I use the tactic of looking through them. Just focus past the image and it'll instantly appear