There are 6 books in the Mercy Watson series. The newest book is Something Wonky This Way Comes which came out in 2009.

1
Mercy Watson to the Rescue

By Kate DiCamillo , Chris Van Dusen (illustrator) ,

Book cover of Mercy Watson to the Rescue

The first adventure of this NEW YORK TIMES best-selling porcine wonder is now available as an e-book. (Ages 6 - 8)

To Mr. and Mrs. Watson, Mercy is not just a pig – she's a porcine wonder. And to the portly and good-natured Mercy, the Watsons are an excellent source…

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2
Mercy Watson Goes for a Ride

By Kate DiCamillo , Chris Van Dusen (illustrator) ,

Book cover of Mercy Watson Goes for a Ride
The amiable Mercy Watson takes an automobile ride she'll never forget in the second tale of an ebullient first chapter-book series by Kate DiCamillo and Chris Van Dusen.

Mr. and Mrs. Watson's porcine wonder, Mercy, loves nothing more than a ride in the car. It takes a fair amount of…

3
Mercy Watson Fights Crime

By Kate DiCamillo , Chris Van Dusen (illustrator) ,

Book cover of Mercy Watson Fights Crime
Mercy's back for a third rollicking adventure!

Leroy Ninker is a small man with a big dream: he wants to be a cowboy, but for now he's just a thief. In fact, Leroy is robbing the Watsons' kitchen right this minute! As he drags the toaster across the counter –…

4
Princess in Disguise

By Kate DiCamillo , Chris Van Dusen (illustrator) ,

Book cover of Princess in Disguise
Can visions of treats entice a porcine wonder to wear her princess costume? Hold on for some Halloween havoc, Mercy Watson-style!

When the Watsons decide to zip their porcine wonder into a formfitting princess dress for Halloween—complete with tiara—they are certain that Mercy will be beautiful beyond compare. Mercy is…

5
Mercy Watson Thinks Like a Pig

By Kate DiCamillo , Chris Van Dusen (illustrator) ,

Book cover of Mercy Watson Thinks Like a Pig
Can Mercy Watson outwit Animal Control? The porcine wonder’s on the lam in her latest tongue-in-snout adventure!

Mercy's appetite has got her into trouble again. When Eugenia Lincoln's pansies go missing, Animal Control Officer Francine Poulet arrives on the scene. But as she soon discovers, not just anyone can think…

6
Something Wonky This Way Comes

By Kate DiCamillo , Chris Van Dusen (illustrator) ,

Book cover of Something Wonky This Way Comes
The porcine wonder is off to the drive-in — and driven to follow that buttery smell — in a comic crescendo that reunites a familiar cast of characters.

Some may find it wonky to take a pig to the movies. But not Mr. and Mrs. Watson, who think the title…