不時着した円盤の謎

From Author Wars - https://authorwars.com/publications/bu-shi-zhao-shitayuan-pan-nomi-692756.html

Overview:

Title: 不時着した円盤の謎
Author: アンドレ・ノートン
Year: 1975
Publisher: 久保書店
Price: ¥600
Pages: 226
Binding: Paperback
Type: Novel
Title Reference: 不時着した円盤の謎
Notes: Data from ameqlist.com. Number 1 in the publisher's Time Agent series; the series with its numbering doesn't appear on the front covers until 3 and 4. Ameqlist notes an essay by 福島正実 (Masami Fukushima) but doesn't give a title.