A book by a great-great-uncle shows Jared, Simon & Mallory the hidden world around them in this series
[DOC] [TLE] Arthur Spiderwick's Field Guide to the Fantastical World Around You ... [PAR] Written by three siblings, the letter told of their great-great-uncle Arthur ... account 
of the those siblings, Jared, Simon, and Mallory Grace, as they battled dwarves, 
..... from Arthur Spiderwick's famous Guide and used them to create a book that is 
.... the Complete Series: The Field Guide; The Seeing Stone; Lucinda's Secret;... [DOC] [TLE] The Seeing Stone (The Spiderwick Chronicles, Book 2) - Amazon.com [PAR] Arthur Spiderwick's Field Guide to the Fantastical World Around You ... the 
creature's pleas that he destroy his great-great-uncle's mysterious tome, ... Jared, 
Simon, and Mallory Grace are still adjusting to their new life after their ...