Having the characteristic style or manner of a guidebook; informative in a formulaic or stereotypical way.
From guidebook (guide + book) plus -ish (meaning 'somewhat like' or 'characteristic of'), creating a subtle, somewhat dismissive descriptor of guidebook-style writing.
The suffix -ish is wonderfully flexible in English—'guidebookish' can be either neutral or slightly mocking, depending on context, showing how tone and attitude shade meaning even in word formation.
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