A short article on how user-defined code should conform to the printed representation of objects (*PRINT-READABLY*) required by the Common Lisp reader.
Slurping a file in Common Lisp
An article that presents different ways of copying a file by reading it into memory and writing it back, and compares their performance.
Snarfing files into strings
A short article on how to read a file into a string in a way that takes the external encoding into account.
What read-delimited-list will and won't do, and changing the reader syntax in CL
A short article on the Common Lisp reader that explains what READ-DELIMITED-LIST actually does, which is not what is usually expected, and how to change the reader syntax.