File System Forensic Analysis: https://www.amazon.com/System-Forensic-Analysis-Brian-Carrier-ebook/dp/B000OZ0N9O
New References
So you want to be a Digital Forensics professional: https://www.peerlyst.com/posts/so-you-want-to-be-a-digital-forensics-professional-calvin-liu?utm_source=twitter&utm_medium=social&utm_content=peerlyst_post&utm_campaign=peerlyst_shared_post
Cheatsheets
Linux Command Line Forensics and Intrusion Detection Cheat Sheet: https://www.sandflysecurity.com/blog/compromised-linux-cheat-sheet/