Monographs are books that have been written jointly by all of the listed authors. A monograph focuses on a topic and, generally speaking, addresses this in a comprehensive and conclusive manner.
You are thus able to gain an overview and deepen your knowledge on a broad basis.
ZHAW swisscovery, for example, is suitable for searching for academic books (monographs, collective works, etc.).
Figure: Cover and the most important bibliographic information (Zotero screenshot)
Döring, N., & Bortz, J. (2016). Forschungsmethoden und Evaluation in den Sozial- und Humanwissenschaften (5. Aufl.). Springer. https://doi.org/10.1007/978-3-642-41089-5