The Door Into Summer

From Author Wars - https://authorwars.com/publications/the-door-into-summer-38601.html

Overview:

Title: The Door Into Summer
Author: Robert A. Heinlein
Year: 1997
ISBN-10: 0345413997
Publisher: Del Rey / Ballantine
Price: $11.00
Pages: 291
Binding: Trade Paperback
Type: Novel
Title Reference: The Door Into Summer
Notes: First Ballantine Books Trade Edition: May 1997 is on the copyright page. There is also a complete number line 10 ... 1. There are two © dates, 1956 and 1957, plus a new LOC number for 1997 though no note as to why it would need one. Cover art by Ashley Wood is on the back cover and W OO D II AUS with the odd spacing is on the art. Also priced $14.95 in Canada