Pete usually used his own door except when he could bully me into opening a people door for him, which he preferred.
Dan Davis is on the verge of amazing riches when he successfully invents a household robot. But he is betrayed by his business partner and fiancee and his company is sold to a big corporation. He does get some money out of the deal and Dan uses that money to put himself into suspended animation. When he wakes up he finds that his money and his stocks are gone. Luckily in the time he has been asleep time travel has become possible. Now he needs to go back in time to set things right. There are many complications and plot twists as Dan works to be reunited with his soul mate and recover his fortune. At the same time Dan is trying to be reunited with his cat Pete. Pete is one of the great characters in this book and the title references him. When Pete finds that there is snow out of one door he asks Dan to open all of the other doors in the house to see if they might be a door into summer. Not only is this a charming bit of the story, it is also a good analogy for the novel’s plot as Dan keeps looking for a way into a sunnier situation.
Check the BPL catalog for this title: The Door Into Summer