I'm usually not fond of series picture books for some reason, but I have soft spot for Roger Hargreaves' Mr. Men and Little Miss books. (Nice website too.)
Mr. Tickle was Hargreaves' first Mr. Men book, published in 1971. I remember loving this one and have read it to my much younger sister and my two kids over the years. It never fails to produce at least one giggle or two. Other favorites include Mr. Nosy and one for which I have a particular affinity, Mr. Messy.
My youngest began tacking on "indeed" at the end of his sentences after multiple readings of these books. It always makes me laugh.
