If you are interested in delving into George R.R. Martin's A Song of Ice and Fire series in chronological order, "The World of Ice and Fire" may not be the best starting point. While it is a comprehensive guidebook to the history and lore of Martin's world, it is not a novel within the series itself.
To begin the series in chronological order, you should start with the first novel, "A Game of Thrones," which is the basis for the TV show Game of Thrones. This will introduce you to the main characters, plotlines, and the intricate world of Westeros.
Here is the recommended reading order for the A Song of Ice and Fire series:
1. A Game of Thrones
2. A Clash of Kings
3. A Storm of Swords
4. A Feast for Crows
5. A Dance with Dragons
After reading these five books, you can continue with "The Winds of Winter" (once it is released) and "A Dream of Spring" to complete the series.
"The World of Ice and Fire" can be a fantastic companion to the series, providing additional background information and expanding your understanding of the world, but it is not necessary to read it before starting the main series.