Here are the possible solutions for they take a while to read clue
Answer
Clue
Relevancy
tomes
Clue
They take a while to read
barcodes
Clue
They're read while shopping
Definition
BARCODE, an arrangement, readable by computer, of thick and thin parallel lines, e.g. printed on, and giving coded details of, goods at a point of sale, library books, etc.
bookgroups
Clue
Well-read thing and some who read it
wordsquare
Clue
Puzzle where the same letters read across as read down
clffnotes
Clue
"Fasten tightly," "read rights while affixing" and the like?
