Also check around for a local Technical College that might offer a class. I didn't buy a book, but i took a 2 part software/hardware class at my local Technical School and that prepped me just fine. Turned out they were also a testing site too boot!
Comptia A+ Exam Specifics:
Exam Cost: $168 each. Download more information on exam prices
Exam Location: You can register for the exam at any Pearson VUE and Thompson Prometric center.
Time Allocated: 90 minutes per exam
Total marks: 900
Minimum Pass Marks: 675 for CompTIA A+ Essentials, 700 for CompTIA A+ Practical Application on a scale of 100-900
Number Of Questions: 100 questions per exam.
Exam format: Linear format; computer-based test (CBT)
Validation Period: As of January 1, 2011 the A+ certification will be valid for three years from the date the candidate completes their certification. A valid through date will appear on all certificates and certificate holder ID badge.
Score Report: Delivered immediate on test completion
Languages: The languages offered for the exams are English, Spanish, German, Turkish, Japanese, Traditional Chinese (Taiwan), Simplified Chinese, Portuguese, and soon to be added Korean.