This volume provides a key excerpts several from Kant, Fichte, Schelling, and Hegel, providing a kind of miniature mosaic of the German idealism.
The anthology begins with portions of Kant's Critique of Pure Reason (the Preface to the second edition), Critique of Practical Reason (Sections 1-8), and Idea for a Universal History for Cosmopolitan Purpose. Though the inclusion of Kant, in a sense, helps to ground the texts from the other figures included in the volume, these specific selections from Kant are already widely available to the English reader (in their entirety), and take up a great deal of room which would have been better devoted to selections of less available texts from the later and more properly "idealist" authors--especially Fichte and Schelling.
From Fichte, the volume includes the Introduction to the (never completed and continuously revised) "Science of Logic" (Wissenschaftslehre). This text is quite helpful in helping to understand Fichte's (initial) objectives for his system, and compliments the other selection, "On the Spirit and the Letter in Philosophy" in terms of articulating how Fichte situates his thought in relation to his predecessors (namely Kant and Reinhold). Lastly, the volume includes Fichte's "Lectures Concerning the Scholar's Vocation," which forms the basis of his practical philosophy.
The texts from Schelling are less comprehensive, and include only his seminal "Ideas for the Philosophy of Nature," and his fascinating essay, "On the Nature of Philosophy as a Science." In my opinion, this volume is worthy of purchase simply on the basis of the latter essay which is not (at least to my knowledge) elsewhere available in English and examines many of the methodological tensions underlying the idealist tradition as Schelling attempts to outline is own "metaphilosophy."
From Hegel, as with Kant, we find a range of selections which are also widely available in English, but which taken together, provide a good elementary introduction to his thought. The anthology includes the Introduction to the Phenomenology of Spirit, the Preface to the Philosophy of Right, and second draft of his Lectures on the Philosophy of History.
As a whole, this is a worthy collection of texts in German idealism but contains a great deal of overlap with the similarly named volume published edited by Ernst Behler, which is a more comprehensive and adequate introduction to this philosophical tradition, containing a range of important texts which are less widely available.