Number of books are under development on Knol. These provide useful articles and essays on various issues related to the subjects.
Computer Science and Engineering - Knol Books - Catalogue
The individual books available are:
Algorithms - Design, Analysis & Improvement and Applications - Knol Book
Computer Architecture & Organization - Knol Book
Computer Programs and Programming Languages - Knol Book
Data Structures - Knol Book
Database Management Systems (DBMS) - Knol Book
Software Engineering, Testing and Project Management - Knol Book
Knol doing a good job in providing focused learning materials.