There is a wide range of books on different aspects of Germany. Here are a few titles to start with.
Beattie, Andrew, Jeroen van Marle, et al. The Rough Guide to Germany. London: Rough Guides, 2018.
Craig, Gordon A. The Germans. London: Penguin, 1991.
Dawes, Nick. Living and Working in Germany. London: Survival Books, 2000.
Fulbrook, Mary. A Concise History of Germany. Cambridge: CUP, 1991.
Green, Stephen. Reluctant Meister: How Germany’s Past is Shaping its European Future. London: Haus Publishing, 2014.
Hawes, James. The Shortest History of Germany. Devon: Old Street Publishing, 2017.
Jones, Alun. The New Germany: A Human Geography. Chichester: John Wiley & Sons, 1994.
Kornelius, Stefan. Angela Merkel, The Chancellor and her World. London: Alma Books, 2013.
Macgregor, Neil. Memories of a Nation. London: Allen Lane Penguin Books, 2014.
Nees, Greg. Germany. Yarmouth, Maine: Intercultural Press, 2000.
Phillips, Jennifer. In the Know in Germany. New York: Living Language, 2001.
Oltermann, Philip. Keeping up with the Germans. London: Faber and Faber, 2013.
Schulte-Peevers, Andrea, et al. Lonely Planet: Germany. Melbourne/Oakland/London,/Paris: Lonely Planet Publications, 2019.
Winder, Simon. Germania. London: Picador Press, 2010.
German. A Complete Course. New York: Living Language, 2011.