"Portal to Infinity" by Keith C. Bradbury.

This is a great book for 2 reasons. 1.The author took the opinions of fans and his own to write the book and that gives the episodes several views as to wether it's good or bad rather than just the authors opinion. 2. The people who sent in thier opinions are listed in the book and I'm in it (that may not be much to you but it's pretty cool for me ) :)

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"The Discontinuity Guide" by Paul Cornell, Martin Day and Keith Topping. I

I love this book because for each entry it lists the stories Roots, Goofs, Doudle Entendres, Dialog Disasters, Dialog Triumps and Continuity.

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Information Books and Guides

Portal to Infinity, The Discontinuity Guide, History of the Universe, Universal Databank, Second Doctor Who Monster Book, Official Doctor Who and the Daleks Book, Programme Guide, Handbooks 1 ,4 5 and 6 Doctors, Strange and Mysterious Creatures, Making of Doctor Who (Tom Baker), Encyclopedia of the worlds of Doctor Who E-K, The Nth Doctor, Terristeral Index, Unfolding Text, The Television Companion, Travel without TARDIS, Howe's Transcendental Toybox and Howe's Transcendental Toybox Second Edition