CSS Images float left error - html

Question

I am a UI Designer. I want each image float to the left one beneath another. But its appearing like. http://delhiwebdesigner.com/images/Capture.png Please check where the problem is. Below is my HTML and CSS Codes:
<div class="books-container">
<article class="entry">
<img src="images/books/1.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/2.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/4.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/3.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/5.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/6.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/7.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/8.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/9.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/10.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/11.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/12.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<article class="entry">
<img src="images/books/13.jpg" alt="" title="" />
<a href="#">
<div class="text">
<p class="head">LeMans</p>
<p class="title">LeMans</p>
</div>
</a>
</article>
<div class="clear"></div>
CSS code as folowed:-
.books-container {
width: 1200px;
margin: 100px auto 0;
}
.entry {
width: 25%;
float: left;
height: auto;
padding: 10px;
position: relative;
}
.entry img {
width: 100%;
display: block;
}
.entry .text {
position: absolute;
display: none;
top: 0;
vertical-align: middle;
height: 100%;
background: red;
opacity: 0.5;
text-align: center;
width: 100%;
padding: 10px;
}

Answer 1

http://jsfiddle.net/6deqxyk4/4/
.books-container {max-width: 1200px;width:100%; margin: 100px auto 0;}
.entry {width:400px; float: left; height: auto; padding: 10px; position: relative;}
.entry img {width: 100%; display: block;}
.entry .text {position: absolute; display: none; top: 0; vertical-align: middle; height: 100%; background: red; opacity: 0.5; text-align: center; width: 100%; padding: 10px;}