background
black
books
brown
collection
concept
culture
dark
dictionary
document
dusty
education
educational
encyclopedia
grey
growth
hardcover
health
heap
information
intellectual
knowledge
ladder
learn
library
light
literacy
literary
literature
many
nobody
old
photo
pile
research
rise
row
school
science
set
stack
study
table
teaching
textbook
tome
tower
university
wisdom
wooden