The Essential Book of K9 is a science fiction anthology book by Paul M. Tams and Bob Baker based on the television series Doctor Who and focuses on the character K9.

The book contains interviews and articles about K9's history and includes a comic strip and short fiction.

The book would've covered the history of K9, interviews with people involved with the character, and never-before-seen photos, designs a behind-the-scenes details.

[4] Another book, The K9 Story Book, was planned for release in 2012, originally set for release in September, 2011, to tie in with the repeat of the first series of the K-9 television series on Channel 5.

[6] To promote the book, a signing with Bob Baker was held at The Who Shop, London, on September 5, 2015,[7] and at The Comic Guru in Cardiff on October 10, 2015.