"Mark Phillips" was the pseudonym of two well-known science fiction writers: Randall Garrett and Laurence M. Janifer. Their joint pen-name, derived from their middle names (Philip and Mark), was coined soon after their original meeting, at a science-fiction convention. Both men were drunk at the time, which explains a good deal, and only one ever sobered up. A matter for constant contention between the collaborators was which one. They collaborated for some years, and devised an interesting method of work: Mr. Garrett handled the verbs, the adverbs and the interjections, Mr. Janifer the nouns, pronouns, and adjectives. Conjunctions are a matter of joint decision, and in the case of a tie, the entire game was replayed at Fenway Park, Boston, the following year. Regardless of who wrote what, Brain Twister is a highly enjoyable novel about spies and telepathy, as only two great writers could have conceived it!

FBI Agent Kenneth Malone is back with another case, this one involving a gang of car thieves that only steal Red 1972 Cadillacs. The only problem is that the thief, or thieves as the case may be, seem to have the ability to make themselves invisible. Of course that's impossible, isn't it? But with the help of the usual beautiful girl, Agent Boyd, and Queen Elizabeth I (Rose Thompson), Malone finds himself hot on the trail of the impossible. CLASSIC SCIENCE FICTION RESURRECTED FROM RANDALL GARRETT AND LAURENCE JANIFER WRITING AS MARK PHILLIPS

Someone is reading the minds of America's space scientists at a secret base in Nevada, and FBI agent Kenneth Malone must find out whom. The problem is that the only way to find a telepathic spy is with another telepath, but Malone discovers that all telepaths are crazy. His best chance seems to be a little old lady who thinks that she's Queen Elizabeth the first. Will Malone find the spy, or will this case prove to be a real brain twister? CLASSIC SCIENCE FICTION RESURRECTED FROM RANDALL GARRETT AND LAURENCE JANIFER WRITING AS MARK PHILLIPS.

FBI Agent Kenneth Malone faces his toughest challenge yet, discovering why the government operates so inefficiently. Is it a plot by some mastermind operating out of the Kremlin? Or is it an even deeper conspiracy whose goal is to sow confusion and chaos throughout the world. Will Malone be able to find the cause of the mysterious psychic static causing the disruption? What will he find when he faces the Supermind? CLASSIC SCIENCE FICTION RESURRECTED FROM RANDALL GARRETT AND LAURENCE JANIFER WRITING AS MARK PHILLIPS