Books for both siblings at once

I would love to see a story book that is about more than one child. It would be nice for both of my children to be mentioned in one book. That's even more unusual and personalized! Jane & Peter Save the Planet! Sam & Henry Go to the Zoo. Adjust the text so it can say "Jane and her brother Peter" or "Sam and his brother Henry, along with cousins Sara and Kate went to the zoo" etc. I realize this is more complex, but adds another dimension of personalization. Other websites offer this, but the quality of their illustrations is no where near yours. Please continue to offer these great products at reasonable prices (along with discounts!).