love the flip book intro NYTime always rocks
It took me a second to figure out that i could scroll down ;)
This is how you do scrolljacking — you keep it responsive. A lot of (poorly) done jacks feel very sluggish with no real sense that your movement is having any effect on the page until you reach some magic threshold and suddenly you jump to the next slide. Here, as you scroll, the pages turn quickly and obviously and it doesn't overstay its welcome.