Hmmm as a second time mum, my only advice- what ever you do make sure you put your baby down to sleep settled not crying but awake. Learning to self settle and put themselves to sleep is the best gift you can give them and you!! Rocking to sleep in your arms becomes very tiresome at 6 months and exhausting - not only do they weigh a lot more then but the more you give them to get to sleep - ie rock, sing, a bottle, they will expect and continue to expect more settling devices. It's soooo important for your sanity and your husbands babies learn to go to sleep themselves. I learnt valuable lessons with my first that I won't be repeating this time around. And with another toddler it's going to be exhausting enough sleep wise. I don't believe in controlled crying its cruel - but there nothing wrong with putting them down warm and cosy not crying to go to sleep on their own. That's my two sense worth. And that book people rave about is hopeless!!! ESP if your baby deviates from normal - mine had severe reflux and didn't sleep thru the night til 18 months!!!! You'll each work it out yourselves and find what's best for you and your bub and your family. But the only advice I give is - don't rock them to sleep in your arms - even if it's beautiful - you'll regret it at 12 months when they weight 10 kg!!