I have been collecting the entire library of books within the game and lack only two editions, any help with confirmed locations of either or both or these would be fantastic. The official strategy guide provides locations which don't seem to house the books. They are: Five Songs of King Wulfharth, and Herbane's Bestiary: Automatons. Thanks in advance to anyone else bold enough to undertake preserving the physical lore of Skyrim! Happy adventuring to you all.

http://elderscrolls.wikia.com/wiki/Palace_of_the_Kings Upstairs in Windhelm. In Ulfric's bedroom under the end table on the right side. -Five Songs of King Wulfharth
Sold by http://elderscrolls.wikia.com/wiki/Urag_gro-Shub in the http://elderscrolls.wikia.com/wiki/College_of_Winterhold.-Herbane's Bestiary