N. E. Renton (d. 2010) was a consulting actuary and author, well known for his many books and articles on investment, business, taxation and retirement issues. R. A. Caldwell is a tax accountant with over 20 years of experience as an Australian Taxation Office (ATO) advisor and a tertiary level lecturer in taxation and management accounting. Rod is the author of Taxation for Australian Businesses, Learn Small Business Accounting in 7 Days and Learn Bookkeeping in 7 Days.