This book is written in a very directive tone, however it is very valuable for new mums as it provides a good structured routine that you can implement and then alter to suit. The developmental stages are useful to help guide you through the first year.
All 3 of my babies were able to sleep through the night from 7pm-7am at 7-8 weeks. I definitely think that the routine contributed to this as well as very tight swaddle! ๐