Exactly. Skimming through a book is not reading a book. Reading a book is not studying what's in a book. That's what I'd assume it's common knowledge about book

Exactly. Skimming through a book is not reading a book. Reading a book is not studying what's in a book. That's what I'd assume it's common knowledge about books. That and the usual study techniques: you read the material once, read it again and underline the key material, maybe you write down a summary with that and/or a scheme, you memorise that a few times —possibly reading it aloud— and then you write it down in your own words.