How to Speak Dragonese (fictional)

How to Speak Dragonese is an in-universe book appearing in the How to Train Your Dragon (series)How to Train Your Dragon Book series book of the same name - How to Speak Dragonese.

Description
The In-universe How to Speak Dragonese appears to be a leather-bound notebook created by Hiccup. He gathered all his information on Dragonese - the language of the dragons - into this notebook, and he carries it around with him everywhere. He is quite proud of it.

History
In Book 3, Hiccup carries How to Speak Dragonese with him during the 'Boarding-an-enemy-ship' lesson, aboard the Hopeful Puffin. Snotlout rams his boat into Hiccup's and sends it whirling off course. Hiccup and Fishlegs find themselves near the Summer Current. In his fear and in the fog, Fishlegs ends up boarding a Roman ship. He is carptured and Hiccup saves him. As they are leaving the Roman ship, the Thin Prefect grabs the How to Speak Dragonese notebook and rips it in two. He also captures Toothless. Hiccup is devastated at the loss of his dragon and destruction of his prized notebook.