Michael Gilbert 
After The Fine Weather [PDF ebook] 

When Laura Hart travels to Austria to visit her brother, vice-consul of Lienz in the Tyrol, she briefly meets an American who warns her of the mounting political tension. Neo-Nazis are stirring trouble in the province, and xenophobia is rife between the Austrians who control the area and the Italian locals. Then Laura experiences the troubles first-hand, a shocking incident that suggests Hofrat Humbold, leader of the Lienz government is using some heavy-handed tactics. Somewhat unsurprisingly, he is unwilling to let one little English girl destroy his plans for the largest Nazi move since the war, and Laura makes a dangerous enemy.