When Mudge gets sick unexpectedly, Henry does all he can to make him feel better.

After eight weeks at Papp's Dog School, Henry's dog Mudge earns a certificate and lots of liver treats.

Summary: While trying out the spy glasses, spy hat, and other items in their new spy kit, seven-year-old Henry and his dog Mudge make a new friend and form a spy club.

While Henry's parents are at a Sweetheart Dance on Valentine's Day, he and his dog Mudge have a wonderful time staying at Mrs. Hopper's house, where they enjoy tea and music and dressing up in various costumes.

Henry and his slobbering dog Mudge are visiting Great-Grandpa Bill, who lives in a house with lots of other grandpas. Henry likes the grandpas because they play checkers and rock in rocking chairs. Mudge likes them because they feed him mint candies. When Henry and Mudge leave the house to go exploring, they find a beautiful swimming pond. They come back to let everybody know, and soon all the grandpas want to go swimming. Henry's father says, "We'll...