User-agent: meta-externalagent
Disallow: /*?*books_2_
Disallow: /*?*books_language=
Disallow: /*?*price=

User-agent: *
Disallow: /*?*books_2_education_grade=
Disallow: /*?*books_2_education_level=

User-agent: Googlebot
Disallow: /*?*books_2_education_grade=
Disallow: /*?*books_2_education_level=
Disallow: /*?*books_2_education_syllabus=