The World of Doonesbury Book Set G.B. Trudeau Vintage 1970's

Vintage 1970's, The World of Doonesbury Box Set by G.B. Trudeau. The box set originally had 5 books. ONE BOOK IS MISSING FROM SET. There are only 4 paperbacks in the original cardboard slip case. The slip case has some wear/blemishes/tears. Books are in-tact with normal wear consistent with age and use. Covers have some wear,marks and creases Pages have some toning/yellowing from age. Pages are clean, no tears, no loose pages. The following titles included are: Call Me When You Find America, Wouldn't A Gremlin Have Been More Sensible?, What Do We Have for the Witness, Johnnie?, Guilty, Guilty, Guilty. Please see all pictures