Hi there, have a look at 'Baby's first skills by Dr.Miriam Stoppard. I would recommend this book, it covers baby's first skills until 12 months old. There is a section for each month explaining what babies should be doing at that age, it also includes lots of activities you can do with your baby to help develop different skills.
I've got What to Expect in the First Year which is good, it has a summary of the key milestones (what your baby should and may be able to do each month) plus the sorts of questions and issues that you might have at each stage.
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