I want a book on introductory Diff. Geometry for self study, but I don't know which book will be suitable for me, and not on a too high level. I know Linear Algebra, single & multi variablecalculus, basic vector calculus and very little about ODE's and PDE's. At the Diff. Geometry course page (of the math department of my university) they recommened as a supplment to their own notes Elementary Differential Geometry by A. Pressley. But they mention that the level of Pressley is a little more difficult than their own notes. But when I read reviews about this book, it seems like this book is suitable for self study and easey to understand. So is this a good material for self study and on the subject of diff. geometry, or maybe someone knows a better material for this subject?