* The Bible: Elizabeth was a devout Protestant and is known to have been very familiar with the Bible. She would have read it frequently and likely had several personal copies.
* Classics of Ancient Literature: She was known to appreciate the works of ancient Greek and Roman authors, such as Homer, Virgil, and Cicero.
* Medieval and Renaissance Literature: She was also known to be interested in the works of medieval and Renaissance writers, such as Chaucer, Shakespeare, and Edmund Spenser.
* Historical and Political Works: Elizabeth was a very intelligent and politically astute queen. She likely read a lot of historical and political works to keep up with current events and understand the complexities of her reign.
Unfortunately, there are no personal writings or diaries from Queen Elizabeth I that specifically mention her favorite book. So, while we can speculate based on what is known about her interests and the books she owned, we can't say for certain what her absolute favorite was.