In 2008 I was lucky enough to find Sarah Thiel to create a frontspiece for each story, thumbnailed below. Clicking on one brings up a brief description of that story.
The Toyman Nearly Nine Christmas Wishes The Grumpy Browns Wheelybins
Halloween Stories Trouble with Gus The House at the end of Witch Street Sunset The Scariest Moment
Teddies Wings Dr MacGregor Monica's Birthday The Empty House
A Strange Place That Year Here Be Giants The Last and Longest Story