Queen Elizabeth II has written about her religious faith in a foreword to a new book.

In the comments released Sunday she said she is grateful to the British public for praying on her behalf and said she has felt God's faithfulness during her lifetime.

"I have been — and remain — very grateful to you for your prayers and to God for his steadfast love," she writes in the foreword to "The Servant Queen and the King She Serves."

The book is to be published by the Bible Society in April to mark the queen's 90th birthday.

In the foreword, she also refers to problems in the Middle East, saying the world is seeing suffering on an unprecedented scale.

The queen is supreme governor of the Church of England.