<p>The first one is the Real Act Prep Guide published in December 2007 and the one below that has the same title but was published in August 2005. I assume these two books have the same practice tests even though they were published at different times?</p>
<p>Just a different edition. Might have different practice tests. These practice books get updated each year, or maybe every two years.</p>
<p>No... these two books have the same tests... buy the second one because it gives answer explanations.</p>