E. P. Dutton & Company, New York, 1951, First Edition stated.  Hard cover, 215 pages.  Black boards with edge, corner and spine wear.  Binding sound; some soil/spots on outer page block.  Dust jacket has some edge and cover wear, has been trimmed (possibly to fit clear cover which is no longer present); all 4 inner flap corners have been clipped with top half of price visible; small hole on fore-edge of rear flap; old tape marks visible.  Jacket flaps are glued to paste-downs.  Rear panel shows stain at top edge, scrape near fore-edge; age-toning.  Interior pages unmarked, a few straightened corner bends, small age-spots.  Front end paper has been removed, and a small ‘v’ missing at top edge of half-title page (possibly during end paper removal).  ‘WBS & LINC’ stamped along upper spine edge of front paste-down; two sets of numbers stamped on rear end paper.  This was possibly a former library book, but there are no stamps, pocket, or usual identifiers present.  ‘Ther Hunter & Hunter Detective Agency, long the ambition of Ed and Uncle Am, is a going concern at last! … Sally Doerr, her relatives the Stantons, the Martian threats, not to mention the actual murders, keep Ed and Uncle Am busy in so many places that it looks as though branch offices are in order.  Pooling their findings in a terrific solution, Ed and Uncle Am operate in this case independently of each other.  Ed is a witness to both murders, but to build his case he has to call on such extra aids as precognition, parapsychology and clairvoyance.  And Uncle Am does the all-important spade work of learning why the murders were committed.’ (from front flap)