John O'Brien's most popular book is Hvergelmir with 3 saves and an average rating of -.
Series
8 primary booksAuthored 38% of series
A Shrouded World is a 8-book series with 8 released primary works first released in 2014 with contributions by Mark Tufo, John O'Brien, and John O'Brien.
Series
93 released booksAuthored 0% of series
Who Was . . . ? Series is a 93-book series with 93 released primary works first released in 2002 with contributions by Michael Burgan, Who H.Q., and Stephanie Spinner.
Series
12 released booksAuthored 0% of series
Where is/are...? is a 12-book series with 12 released primary works first released in 2015 with contributions by Patricia Demuth, Megan Stine, and Who Hq.