We just implemented the library system within Rattenkieg! Now, users can download books and manuals published or related to the Second World War as if they were Data cards. They have zero cost since they are publications that have been declassified or public domain.
They are mainly about military doctrine, weapons or OOB’s.
To find them, just click on the book icon. The flag shown on the Datacard most of the times is related to the topic of the book (for example, if the book is about Japanese forces, the Datacard will show a Japanese flag), but in some cases, when the book is about topics related to several nations, it will show the flag of the publishing agency or department.