Sparks (Skyrim)

Sparks spell book may be found in a prisoner cage after escaping the dragon attack in the beginning of Skyrim. Follow either the Imperial or Stormcloak NPCs to lead you into the building then look for the prisoner cage. You will need to lockpick the prisoner cage. The prisoner NPC will then let you take his possessions for freeing him. His possessions include the Sparks spell book.

(Please add a map or additional information to help locate the book.)