This book is the culmination of 15 years of experience in the international arena, International Petroleum Fiscal Systems and Production-Sharing Contracts. The practical examples and step-by-step calculations in the book, illustrations, and diagrams, make it understandable and easy to read. Johnston does an excellent job clarifying international oilfield taxation and regulation in the same way he explained oilfield accounting in his other PennWell title, Oil Company Financial Analysis in Nontechnical Language. Covers everything from historical development of contracts to terminology of accounting and negotiations, to threshold field size analysis, to arithmetic behind contract terms, and much more.