"My 3 month old definitely follows the 90 min. sleep cycle. Lately, he has been taking 2-3 very long naps (3 – 3 ∏  hours). Should I ever wake him from these long naps? Will these naps cause him to stay awake at night more. It seems that he has awakened more the last couple of nights (not b/c he’s hungry). The other thing that I have done differently the last couple of nights is wake him before I go to bed for a bottle. Is this the cause of him waking in the night more or is it the long naps???"

- Velvet & Jon

As I discuss in the book, I don't recommend interrupting naps or shortening naps for the illusory purposes of helping the baby sleep better at night.  Disrupting naps generally does not lead to better nighttime sleep.   

I take the longer naps as a sign that your baby is now sleeping better, a good sign.  He may be catching up on lost sleep.  That's a very good thing.  That's also possibly an indication that you are really reading and responding to all of his sleepy signals, right on cue.  Good for you! 

If that's the case, then usually the naps may be longer than usual for a few days, but will usually revert back.  

And I consider a 3-hr nap a decent nap,  I don't consider it "too long."  Not at all!  Not at your baby's tender age.  To my mind it's more likely that it reflects a temporary adjustment for his lost sleep.

It is also possible that he was waking up not because of the naps but because of the additional feeding.