24 hours to the law enforcement exams
by Gosney, John
Part of Arco´s fast-track test preparation series, for aspiring law-enforcement professionals
by Kaprov, Ronald M.
Topic reviews for all five subjects, test taking tips, and practice exams.
Postal exam quick course : exams 470 & 460
by Parnell, T. W.
Complete test preparation in less than 12 hours