Rick Riordan ... [et. al.] Rick Riordan ... [et. al. Rick Riordan...[et al.] Rick Riordan...[et al. Tracy Borman ... [et al.] Tracy Borman ... [et al. Eric Baron ... [et al. Jill Norman ...[et al. Joan Hoffman ... [et al.] Liz Tynan ...[et al.]