It's the Study of Ticks and Mites
This page is the CodyCross answer for the clue below from Street Fair, Group 1315, Puzzle 2 (Bookstalls).
Question is: It's the Study of Ticks and Mites
and the answer is: ACAROLOGY
Word Meaning:
ACAROLOGY — (zoology) The study of ticks and mites.
Definitions from Wiktionary.