Books for soon to be siblings

[girlanonymous]

Not sure where to post this.

I'm only 15 weeks pregnant but already thinking about my son and how he'll react to being told he's going to be a big brother.

Can anyone recommend any books for a soon to be big brother? He's going to be 4 next month and is an only child.

We have ‘there’s a house inside my mummy’ which is good (more about pregnancy than actually being a brother!)

The New Small Person by Lauren Child.