Finding Milk matters: infant feeding and immune disorder  as two interactive searchable e-books online:

For parents and professionals wanting help with crying babies:

Crying babies and food in the early years

Apple iTunes

http://itunes.apple.com/us/book/id1164045837

Amazon Kindle:

https://www.amazon.com/dp/B01LXR34XK

Kobo:

https://store.kobobooks.com/en-us/ebook/crying-babies-and-food