Six Sigma Certification Preparation

Here are few of the best books for the preparation of six sigma certification:-
1) The Certified Six Sigma Green Belt Handbook by Roderick A. Munro and Govindarajan Ramu.
2) Statistics for Six Sigma Made Easy. Revised and Expanded Second Edition by Warren Brussee.
3) Six Sigma Demystified, 2nd Edition by Paul Keller.
4) A Guide to Six Sigma and Process Improvement for Practitioners and Students: Foundations, DMAIC, Tools, Cases, and Certification (2nd Edition) by Howard S. Gitlow, Richard Melnyck, David M. Levine.

Hi Rati
The best books to prepare for six sigma certification are :
Certified Six Sigma Yellow Belt Exam Secrets Study Guide: CSSGB Test Review for the Six Sigma Yellow Belt Certification Exam by CSSYB Exam Secrets Test Prep Team
The Six Sigma Yellow Belt Handbook by H. James Harrington & Frank Voehl
The Six Sigma Handbook by Thomas Pyzdek & Paul Keller
Six SIGMA Green Belt Study Guide: Test Prep and Practice Questions for the Six SIGMA Green Belt Exam by Trivium Test Prep
All the best

Hi Anu,
Please refer to the link below :
https://it.shiksha.com/six-sigma-certification-in-india-categorypage-10-118-1-0-0-1-1-2-0-none-1-0
All the Best