Download Free Internal Audit Books which are very Costly at Bookstores or an official Website(theiia.or)
Source https://auditworkingpapers.tk/
1 Challenges in Government Auditing
2 Evaluation of Internal Auditor's Responsibility for Fraud Detection
3 Formulating and Expressing an Internal Audit Opinions
4 Auditing External Bussiness Relationship
5 GAIT Methodology
6 GAIT For I.T General Controls Deficiency Assessment
7 GAIT For Bussiness and I.T Risk
8 Extensible Bussiness Reporting Language
and many more books and Audit working papers.