Time Traveler's Handbook of 1001 Tense Formations is a grammar book by Dr. Dan Streetmentioner. It is about what tense formations to use when discussing time travel, and is supposedly "the main work to consult on this matter".
However, the book is exceptionally confusing, and most readers only get as far as the section on the Future Semiconditionally Modified Subinverted Subjunctive Intentional before giving up. Because of this, in later editions of the book all pages beyond this point have been left blank to save on printing costs.
- This topic was addressed on "The Big Bang Theory" in S08E05 The Focus Attenuation in which the main characters attempt to unravel the causality of Back to the Future II, and they likewise struggle to find what they feel are appropriate verb forms.