this is not specifically about Pinky and the Brain, but there is a book with two characters who are nicknamed Pinky, and also The Brain. anyone who enjoys the cartoon, may enjoy this book,
The Atrocity Archives, by Charles Stross. this, and subsequent books in this series, read like Lovecraftian horror, James Bond, and Brazil, all mixed together in nearly equal proportion. Stross is an amazing scifi writer. The Atrocity Archives is not scifi.

Happy New year. cheers.