WW2shop.com gives you a list of some of the best and affortable book series available about the Second World War.
Dell Publishing World War II Library: For the hundreds of thousands of readers fascinated by World War II history, Dell has created the World War II Library - outstanding nonfiction narratives that convey the total experience of war with historical accuracy and detailed immediacy that until now could be understood only by those who had fought it.
Pen and Sword: Battleground WWII: Books of the Pen and Sword Battleground series are well written and highly illustrated guide books who not only bring the battlefields alive for visitors but inform and entertain the readers at home.
Pen and Sword: Military Classics: Pen & Sword has published the Military Classics Serie. Below is a list of the 54 first books published, there are more, but the numbers are yet unknown to us.
And the following: