Figured I would repost these links to the artbooks here in case anyone is interested.

VC 1 Design Archive - the big one, lots of dev notes and lore. VC1 is set in the Gallian theater of the Second Europan War (EW2). It includes the most info about the First Europan War (EW1), too.
http://www.mediafire.com/file/5ciw3mcp0thrp9q/Valkyria_Chronicles_1_Design_archive_%255Benglish%255D.zip/file

VC 1 Artbook - mostly duplicate stuff from the VC1 Design Archive, but get it if you're curious.
http://www.mediafire.com/file/4pq7jbei8mh1hwi/Valkyria_Chronicles_-_Artbook.zip/file

VC 2: World Artworks - VC2 is set after the end of the Gallian theater of EW2, but before the war in Europa ends. 
http://www.mediafire.com/file/jbbnbkrctf3qzwa/Valkyria_Chronicles_2_artbook.zip/file

VC 3: Complete Artworks - VC3 takes place at the same time as VC1. 
http://www.mediafire.com/file/81aqrayhji8c2y7/Valkyria_Chronicles_3_complete_artworks.zip/file