Record books are fairly new to Destiny they were introduced just before Rise Of Iron came out, but will play a much larger role in the new expansion.
These record books serve as a meta-challenge that players will progressively unlock towards during the course of their adventure in Rise Of Iron. They will level the book and unlock rewards as they do so. Check out the unlocks below. NOTE: Each piece of IRON ARMOR grants three pieces, one for each class.
Level 2- IRON ARMOR: ARMS
Level 4- IRON ARMOR: LEGS
Level 6- Iron Song Shell (Ghost Shell) [340 Defense]
Level 8- IRON ARMOR: CHEST
Level 10- IRON ARMOR: HEAD
Level 12- Memories Of Iron Emblem
Level 14- Winter’s End Shotgun [340 Attack with Solar damage]
Level 16- IRON ARMOR: CLASS ITEMS
Level 18- Banner Unbroken (Armor Shader)
Level 20- Once And Future (Ship)
Level 22- Days Of Iron Ornament (Used in conjunction with Silver Dust to active an ornament for the ‘Days Of Iron’ armor)
Level 24- Shield Of The City (Emblem)
There you have it Guardians. Get out there and earn all the unlocks for the Rise Of Iron Record Book.