More clarification to Mayank,
There are 2 books related to SAP SD Certification. TSCM60 and TSCM62. Which covers 95% of syllabus of SAP SD Certification exam.
To clear SAP SD certification, you need to read them 3-4 time if you do not have any SAP SD experience. Otherwise you can get clarity by reading them once. Apart from this, SAP SD summary questions really helped me when I have cleared my certification.
Ramanna