THE MEMOIRS OF SOLAR PONS, by August Derleth. Mycroft & Moran, Sauk City, Wisconsin, 1951. pp. xxii., 245. $3.00. 2,038 copies printed. Contents: _Introduction_, by Ellery Queen / _The Adventure of the Circular Room_ / _The Adventure of the Perfect Husband_ / _The Adventure of the Broken Chessman_ / _The Adventure of the Dog in the Manger_ / _The Adventure of the Proper Comma_ / _The Adventure of Ricoletti of the Club Foot_ / _The Adventure of the Six Silver Spiders_ / _The Adventure of the Lost Locomotive_ / _The Adventure of the Tottenham Werewolf_ / _The Adventure of the Five Royal Coachmen_ / _The Adventure of the Paralytic Mendicant_. THREE PROBLEMS FOR SOLAR PONS, by August Derleth. Mycroft & Moran, Sauk City, Wisconsin, 1952. pp. vii., 112. $2.50. 996 copies printed. Contents: _A Note for the Aficionado_ / _The Adventure of the Rydberg Numbers_ / _The Adventure of the Remarkable Worm_ / _The Adventure of the Camberwell Beauty_. THE RETURN OF SOLAR PONS, by August Derleth. Mycroft & Moran, Sauk City, Wisconsin, 1958. pp. xiii., 261. $4.00. 2,079 copies printed. Contents: _Introduction_, by Edgar W. Smith / _The Adventure of the Lost Dutchman_ / _The Adventure of the Devil’s_ _Footprints_ / _The Adventure of the Dorrington Inheritance_ / _The Adventure of the “Triple Kent”_ / _The Adventure of the Rydberg Numbers_ / _The Adventure of the Grice-Paterson Curse_ / _The Adventure of the Stone of Scone_ / _The Adventure of the Remarkable Worm_ / _The Adventure of the Penny Magenta_ / _The Adventure of the Trained Cormorant_ / _The Adventure of the Camberwell Beauty_ / _The Adventure of the Little Hangman_ / _The Adventure of the Swedenborg Signatures_. BILL’S DIARY, by Dwig (Clare Victor Dwiggins). Stanton & Lee, Sauk City, Wisconsin, 1945. pp. xx., 288. $2.00. 2,002 copies printed. Contents: _Dwig--and Bill_, _Eternal Boy_, by August Derleth / _Bill’s Diary_ (cartoons) / _Night-Haunt_, _Spring Rain_, _Woods Music_, _Leaf Burning Time_, _Snow_, by August Derleth. EVENING IN SPRING, by August Derleth. Stanton & Lee, Sauk City, Wisconsin, 1945. pp. x., 308. $1.49. 2,990 copies printed. A reprint of the Charles Scribner’s Sons edition of 1941, with a new _Foreword_. OLIVER, THE WAYWARD OWL, by August Derleth. Illustrations by Dwig. Stanton & Lee, Sauk City, Wisconsin, 1945. pp. 84. $1.50. 3,089 copies printed.