3 Ace Double Books from 1954/57/58

Ace Double Book D-44 from 1954 contains:
"Sentinels Of Space" by Eric Frank Russell
and
"The Ultimate Invader and Other Science Fiction," a collection of stories:
"The Ultimate Invader" by Eric Frank Russell
"The Malignant Marauder" by Murray Leinster
"The Temporal Transgressor" by Frank Belknap Long
"The Alien Envoy" by Malcom Jameson

This book is in good condition. Complete.
Covers have medium reflectivity, minor soiling, shows wear, corners are lightly blunted, no tears, no chips, some fold lines. Spine is in good condition with no splits, shows wear, no tears. Interior pages are all attached, off white going to light tan, no tears or folds.
See pictures for details.

Ace Double Book D-255 from 1957 contains:
"City Under The Sea" (first time in print) by Kenneth Bulmer
and
"Star Ways" by Poul Anderson
This book is in fair condition. Complete.
Covers have good reflectivity, minor soiling, corners are blunted, shows wear, no tears, no chips, some folds. Spine is in poor condition, shows wear, 1/3 of spine is missing, splits at other end. Interior pages are all present, some  unattached, off white going to tan.
See pictures for details.

Ace Double Book D-315 from 1958 contains:
"Six Worlds Yonder" by Eric Frank Russell
and
"The Space Willies" (first time in print) by Eric Frank Russell
This book is in fair condition. Complete.
Covers have good reflectivity, minor soiling, corners are blunted, shows wear, no tears, no chips, several fold marks and wrinkle lines on both sides. Spine is in poor condition, shows wear, splits at both ends. Interior pages are all present, some  unattached, white going to off white.
See pictures for details.

All have 35c cover price.

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