You might start with reading the following books: 

Shame: Interpersonal behavior, psychopathology, and culture.

Series in affective science.

By Gilbert, Paul (Ed); Andrews, Bernice (Ed)

1998.

Addresses the variety of approaches to shame, as well as ways of conceptualizing shame. The first section of the book attempts to cover some of the core issues and current controversies concerning shame. Some of the issues addressed in this first part include the relationship of shame to negative internal and external evaluation, the linkage with anxiety and anger, and the way in which shame acts as a modulator of interpersonal and social relationships. The second section of the book addresses the relationship of shame and interpersonal behavior. The third part explores the linkage between shame and psychopathology. The fourth and final section of the book raises the important notion that shame is not just related to internal experiences but that notions of shame act as socially shared information about one's status and standing in the community. It is noted that shame cannot be seen purely as a self-conscious experience but as one which encapsulates a multitude of domains that relate to social interaction. (PsycINFO Database Record (c) 2016 APA, all rights reserved)

Shame and the origins of self-esteem: A Jungian approach.

Routledge mental health classic edition.

By Jacoby, Mario

2017.

Shame is one of our most central feelings and a universal human characteristic. Why do we experience it? For what purpose? How can we cope with excessive feelings of shame? In this elegant exposition informed by many years of helping people to understand feelings of shame, leading Jungian analyst Mario Jacoby provided a comprehensive exploration of the many aspects of shame and showed how it occupies a central place in our emotional experience. Jacoby demonstrated that a lack of self-esteem is often at the root of excessive shame, and as well as providing practical examples of how therapy can help, he drew upon a wealth of historical and cultural scholarship to show how important shame is for us in both its individual and social aspects. This Classic Edition includes a new foreword by Marco Della Chiesa. (PsycINFO Database Record (c) 2017 APA, all rights reserved)

Shame-proneness, guilt-proneness, and psychological symptoms.

By Tangney, June Price; Burggraf, Susan A.; Wagner, Patricia E.

Tangney, June Price (Ed); Fischer, Kurt W. (Ed). (1995). Self-conscious emotions: The psychology of shame, guilt, embarrassment, and pride , (pp. 343-367). New York, NY, US: Guilford Press, xvii, 542 pp.

review the theoretical literature, showing that many psychologists have failed to distinguish between shame and guilt when discussing the role of these emotions in psychological disorders / focus on depression . . . to argue that proneness to shame—not guilt—is a potent and potentially maladaptive affective style with negative implications for psychological adjustment / review the relevant empirical literature to demonstrate that when shame and guilt are measured in a theoretically appropriate manner, shame-proneness is associated with depression and other psychological symptoms, whereas a tendency to experience "shamefree" guilt is essentially unrelated to maladjustment / highlight results from a recent study considering 2 different methods for assessing a dispositional tendency toward shame and guilt / speculate about the nature of "pathological" guilt . . . suggesting that guilt experiences become maladaptive largely when they become fused with shame (PsycINFO Database Record (c) 2016 APA, all rights reserved)

Shame and guilt, misconceptions and controversies: A critical review of the literature.

doi: http://dx.doi.org/10.1177/1534765608321070

By Blum, Alon

Traumatology, Vol 14(3), Sep 2008, 91-102.

The literature on shame and guilt is very heterogeneous. Researchers and theorists in the field have used a number of definitions, approaches, and measurement methods, rendering futile any attempt at a comparative analysis. The article reviews the relevant literature and summarizes the different approaches to shame and guilt while highlighting relevant conceptual issues. The literature review is followed by a thorough delineation of the two constructs. Affective, cognitive, and phenomenological definitions are discussed for a fuller understanding of the phenomena. The cognitive attributional theory is discussed and is also used to explain the process of elicitation. The delineation of shame and guilt is followed by a comprehensive discussion of parsimony. In addition to drawing attention to the current multiplicity of definitions in the literature, the article intends to serve as a more unified framework for future studies of shame and guilt. (PsycINFO Database Record (c) 2016 APA, all rights reserved)

The topic of shame is very interesting and it's discussed in philosophy, especially when it is often intertwined with guilt. Since you're from Berlin (and I hope you speak German) this book (2017) might interest you: Ursula Ernst (2017): "Verflucht ist, wer sich nicht schämt. Kleine Philosophie des Schamgefühls" (http://www.passagen.at/cms/index.php?id=62&isbn=9783709202890&L=0)

The Author relates her analysis on the works of Platon, Descartes, Kant, Kierkegaards, Thomas von Aquin, Adorno and Walter Benjamin to follow the topic of shame and guilt.