Such was warding the books rather than the entire Restricted Section. However, Quirrel seems to want to keep Harry away from quite a bit of knowledge: not just particular books, but the entire Restricted Section; not just random spell creation bits, but the entire field of spell creation. This suggests to me that there no single book that is problematic, but any book dealing with the topic at all beyond the fake “usual evasions”. If that’s the case, then he can’t do much else—what is he going to do, abscond with an entire wing of the library?
Such was warding the books rather than the entire Restricted Section. However, Quirrel seems to want to keep Harry away from quite a bit of knowledge: not just particular books, but the entire Restricted Section; not just random spell creation bits, but the entire field of spell creation. This suggests to me that there no single book that is problematic, but any book dealing with the topic at all beyond the fake “usual evasions”. If that’s the case, then he can’t do much else—what is he going to do, abscond with an entire wing of the library?
Note that warding books A, B, and C leaks more bits of information than warding all restricted books.
That’s a good point too.