http://gen.lib.rus.ec/book/index.php?md5=BA7D8EA70B60622AE2D42283808D763F

>Walter Schellenberg - Hitler’s Secret Service (The Labyrinth)

memoirs

>formerly classified book review by CIA intelligence officer Clinton Gallagher from 1957

https://www.cia.gov/library/readingroom/docs/DOC_0000606545.pdf

http://gen.lib.rus.ec/book/index.php?md5=21B12B4FC9CFA7574468CD4642DD3C1B

>Régine Pernoud - Those terrible Middle Ages : debunking the myths (2000)

http://gen.lib.rus.ec/book/index.php?md5=80DEC39AC33F39756BC1BE3DFCD6D189

>James Hannam - The Genesis of Science: How the Christian Middle Ages Launched the Scientific Revolution (2011)