Yes, it's always difficult to reread a beloved book from your childhood or teenage years, for fear of getting disappointed. For me Tunnel in the Sky was
Thank you for your help.
Just purchased a Kindle bundle of 11 books by Harry Harrison, including Deathworld for $1.24 :-) .
3870 so far! But it is extremely clear that this is becoming a full-fledged novella, so it will absolutely not be done this month. I'm up to 6500 words
JimF is correct. It IS the first Deathworld book.