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1. LPIC I Exam Cram 2 : Linux Professional Institute Certification Exams 101 and 102 (Exam Cram 2) (Paperback) 
by Ross Brunson 
2. LPIC-1 : Linux Professional Institute Certification Study Guide (Level 1 Exams 101 and 102) (Paperback) 
by Roderick W. Smith
3. LPI Linux Certification in a Nutshell (Paperback) by Jeffrey Dean
4. LPIC 1 Certification Bible (Bible) (Hardcover) by Angie Nash, Jason Nash