How to use WP_Query to retrieve any number of posts ?
WP_Query is a class defined in wp-includes/query.php that deals with the intricacies of a post's (or page's) request to a WordPress blog. The wp-blog-header.php (or the WP class in Version 2.0) gives the $wp_query object information defining the current request
arguments, loop, meta, ordering, parameters, posts, queries, results, retrieve, taxonomy, wordpress, wp_query
