doc: fixed readme file

Author: leonhad

README.md

@@ -4,6 +4,14 @@ Digitalized version of Structured Programming by Q.-J. Dahli, E. W. Dijkstra and
 
 
 
+This book consists of three essays:
+
+* “Notes on Structured Programming” by E.W. Dijkstra
+* “Notes on Data Structuring” by C.A.R. Hoare
+* “Hierarchical Program Structures” by O.-J. Dahl and C.A.R. Hoare
+
+
+
 Original can be found at https://dl.acm.org/doi/book/10.5555/1243380#CIT
 
 All rights belong to [ACM Digital Library](https://dl.acm.org/about).