I guess DrankTheKoolaid didn't DrankTheKoolaid. What DrankTheKoolaid (Corky?) said is true, however, it's way more than what you need to do to dominate in the didactic portion of paramedic school. You can easily get by without doing any preparing.
Veneficus wrote a nice thread on
Resuscitation Experts, which he recommended some books. In the thread, he didn't recommend any books that covers Anatomy. He did tell me that he recommended
Clinically Oriented Anatomy and to use
Color Atlas of Anatomy: A Photographic Study of the Human Body as an adjunct. I noticed a popular Anatomy & Physiology book is also
Marieb, however, it studies Anatomy & Physiology as one subject.
Many paramedics will swear by "The Orange Book",
Dale Dubin's Rapid Interpretation of EKGs, and honestly, I mostly follow Dubin's systematic approach to 12-lead interpretation: rate, rhythm, axis, hypertrophy/enlargement, and looking at the Q-waves, ST-segment, and T-waves last, but the book is really meant to lure children. I recommend
The Art of Interpretation: 12-lead ECGs by Thomas Garcia if you're at least 8-years-old.
If you do decide to invest money into these books or go to school, I would recommend studying chemistry first, biology second, and physiology third. You may study anatomy in parallel to those subjects, but it was recommended to me to study anatomy and physiology separately.
Understand that this route may be actually pretty depressing. You will not immediately be able to apply a lot of what you learn to paramedicine; it's very slow and not immediately rewarding. When you are able to apply it to paramedicine, you will likely experience the Cassandra effect frequently. In fact, taking this route may actually make paramedic school more difficult for you.
I believe that had I believed in the Holy EMS Trinity, if I believed all the aphorisms said in EMS, parrot it, I'd probably be more satisfied with this field.
May Saint Florian watch over you!