Angels and Demons:

This Mystery-thriller novel was written by American author Dan Brown and it was published by Pocket Books in the year 2000. It is this novel which has introduced the character of Robert Langdon. He is also the leading role of Brown’s other subsequent novel The Da Vinci Code, released in the year 2003 and of the novel Lost Symbol in the year 2009. This book contains of several typographical designs created by real life typographer John Langdon.

The Lost Symbol:

This novel is a thriller set in Washington D.C and is written by Dan Brown. This book was published in the year 2009 and it had first printing of 6.5 million, which is the largest in Doubleday history. It became the fastest selling adult novel in history, as on its first day the book sold one million in hardcover and e-book versions in the U.S., the UK and Canada. For the first six weeks of its release, it was number one on the New York Times Best Seller list for hardcover fiction, reports the Wikipedia