1. Albert-László Barabási, Network Science (Free Preprint)

http://barabasilab.neu.edu/networksciencebook/downlPDF.html

2. Reza Zafarani, Mohammad Ali Abbasi, Huan Liu. Social Media Mining: An Introduction. Cambridge University Press (Free Preprint)

http://dmml.asu.edu/smm/SMM.pdf

3. David Easley, and Jon Kleinberg. Networks, Crowds, and Markets: Reasoning about a Highly Connected World (Free e-book).

http://www.cs.cornell.edu/home/kleinber/networks-book/

4. Hadley Wickham. R Packages

5. ggplot2. Hadley Wickham

https://github.com/hadley/ggplot2-book

6. Statistical Analysis of Network Data with R

https://github.com/kolaczyk/sand

7. Data Journalism Handbook

http://datajournalismhandbook.org/

8. Free data mining e-books at Data Science Central

http://www.datasciencecentral.com/profiles/blogs/27-free-data-mining-books?overrideMobileRedirect=1