This is the fourth book in the Ranger's Apprentice series; there are twelve books planned in this series with the tenth book,&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Ranger-s-Apprentice-Book-10-The-Emperor-of-Nihon-Ja/dp/0399255001/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Ranger's Apprentice, Book 10: The Emperor of Nihon-Ja</a>, released in April of 2011.  This was a good book in the series and continues the story line that was started in book 2,&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/The-Burning-Bridge-The-Ranger-s-Apprentice-Book-2/dp/0142408425/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">The Burning Bridge (The Ranger's Apprentice, Book 2)</a>.