If you are thinking of CPA prepration, then contact Darius Clark. I would highly recommend I-75course for CPA as his material and his video lectures are so easy to understand, to the point and covers everything you need for thorough understanding to sit for the exam. His material also covers practice questions as per topic in every chapter to make that topic clear which left no room for doubt, which helped me a lot. You wouldn’t need any other material for understanding the subject if you have I-75course as Darius is easily approachable and responds quickly to any query. Thanks Darius for responding quickly and for your wonderful course which made complex material easier for me.