Bobrow’s circuit diagrams are his secret weapon. While the text is fine on a screen, you should print the diagram pages (usually Figures 3.1 through 4.15) and keep them in a binder. Redraw the circuits yourself. You don't learn by reading the PDF; you learn by copying the circuits.
If your search for a has come up empty (or you only found corrupted files), don't despair. Here are three books that follow Bobrow’s pedagogical style: leonard s bobrow pdf
If you cannot find the PDF legally, ask your instructor if an older edition (1st ed., 1981) is acceptable – it is often available used for under $10 and covers the same core topics. Bobrow’s circuit diagrams are his secret weapon