as far as accounting is concerned there are many helpful book out there for starters....... some are here as under....
1-Accounting Best Practices By Steven M. Bragg
(link for download)
2-ESSENTIALS of Credit, Collections, and Accounts Receivable By Marry S.S
(link for download)
3-Crash Course In Accounting And Financial Statement Analysis
(link for download)
4-Accounting for Non-Accounting Students By John R. Dyson
(link for download)