The Book of Dragons is just what it sounds
like; a book about dragons!
This book is also the shop where information about each of the 435 different Dragons can be found.
The Book of Dragons will also indicate if the Dragons can be purchased directly with Runes 
.
The Book of Dragons in the Dragons: Rise of Berk game are categorized with the help of two different tabs:
The first tab in the Book of Dragons defines the sources from which the Dragons may be obtained:
- All Sources
- Exploration
- Collection
- Journey
- Card Pack
- Brawl
The second tab in the Book of Dragons defines the possession status of the displayed Dragons:
- No Filters
- Owned
- Not Owned
If no filters are selected, then all Dragons are listed with the other Dragons of their Flock.
The book is frequently updated.