Sometimes even the undivided attention of grandparents isn't enough to soothe a fussy baby.
Last week it seemed like nothing was working to keep Noah calm, but thankfully the weekend and some of Yilin's books have brought a change to that. Our problem was probably not noticing Noah's cues. We didn't really realize when he was tired and when he was over stimulated. Now, we try to make sure he's not awake for long stretches of time and immediately get him to sleep when he shows just the slightest sign of tiredness.
The counterintuitive thing is that the more Noah naps during the day, the longer he'll sleep at night. We've only been doing this for two days, so we'll see how next week goes. Hopefully things will remain as they are now.