Complex sentence: First, Hegel wrote the book under close time constraints with little chance for revision (individual chapters were sent to the publisher before others were written), and according to some readers may have changed his conception of the project over the course of the writing.
Split into simpler sentences: First, Hegel wrote the book under close time constraints with little chance for revision (individual chapters were sent to the publisher before others were written). Furthermore, according to some readers, Hegel may have changed his conception of the project over the course of the writing.