Posts by Author without Plugin

This snippet will show the last posts by the current author in Wordpress.

<?php

  //Gets category and author info
  global $wp_query;
  $postauthor = $wp_query->post->post_author;
$tempQuery = $wp_query;
  $currentId = $post->ID;

// related author posts
  $newQuery = "posts_per_page=5&author=" . $postauthor;
  query_posts( $newQuery );
$authorPosts = "";
  $count = 0;
if (have_posts()) {
  while (have_posts()) {
  $count++;
  the_post();
  if( $count<4 && $currentId!=$post->ID) {
  $count++;
  $postsbyauthor .= '<li><a href="' . get_permalink() . '">' . the_title( "", "", false ) . '</a></li>';
   }
  }
 }
 $wp_query = $tempQuery;
?>

Put the following line where you want the data to be shown in your post:

<ul>
 <?php echo $postsbyauthor; ?>
</ul>