New Delhi, March 20 -- Prince William and Princess Kate Middleton have faced back-to-back crises: Queen Elizabeth's death, King Charles's cancer diagnosis and then Kate's own shocking cancer diagnosis. But, through it all, the couple's bond has only grown stronger, according to royal journalist Russell Myers.

Myers has written a new book on the couple. He spoke to dozens of people close to Kate and William. He says most people do not realise how central Kate is to the monarchy and to William personally.

"William relies on Catherine professionally, personally and emotionally," Myers said.

When Kate received her cancer diagnosis, it was just days after Charles's. William was shattered, but Kate stayed calm. She quickly decided both of th...