Son of Neptune by Rick Riordan

 ★★★¼
SUBJECT: Roman mythology
GENRE: Fantasy
Setting: California, Alaska
CHARACTERS: Percy Jackson, Frank Zhang, Hazel Levesque, Juno, Orion
DATE READ: November 11 - November 18
NO. OF PAGES: 521
Off the Shelf (pre-2013)? Source?:   yes, audio stockpile

yes, audio stockpile

 PLOT:....................................................................3.50CHARACTERIZATION:.......................................3.50
TOPICS: ...............................................................3.00
STYLE:..................................................................3.00
ORIGINALITY:.......................................................3.50
ADDICTIVENESS:..............................................3.50
OWNERSHIP:......................................................3.00
Threshold Quality.................................................3.00
Average..............................................................................................3.25

Percy Jackson reappears minus his memory and is directed by an elderly lady, who turns out to be Juno, to Camp Jupiter were Percy is befriended by a pair of misfits (demigods of Hades and Ares).  They are sent on a quest to free Thantos and save the world from Gaea. 

The special powers of both Hazel and Frank added to Percy's, aid the trio in the travels and combats.

What fun!