Engineering Thermodynamics
Shares rank 4 of 13 physics textbooks by recommenders
A free, clear engineering thermodynamics textbook with answers to all its problems. Its PDF is large at 40MB and its focus is fairly narrow.
A free, clear engineering thermodynamics textbook with answers to all its problems. Its PDF is large at 40MB and its focus is fairly narrow.
6 people gave an opinion
- recommend it
- 6
- criticize it
- 0
- approval share
- 100%
Recommended in 1 of 13 months
- November 2025: not recommended
- December 2025: not recommended
- January 2026: not recommended
- February 2026: not recommended
- March 2026: not recommended
- April 2026: recommended
- May 2026: not recommended
- June 2026: not recommended
- July 2026: not recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 6 people recommend itNeeds 10 or more, not met.
- Nobody criticizes itNeeds 2 to 1 or better, met.
- Recommended in 1 of 13 monthsNeeds 4 or more, not met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
What people warn about
Each mark is one comment
Large 40MB PDF file
“You might want to look at optimising the PDF, it's sitting at 40MB right now.”
Comment from 26 Apr 2026 in “Free Textbook on Engineering Thermodynamics” Narrow focus on thermodynamics
“So it's fairly narrow focus, but that is not necessarily a bad thing.”
Comment from 26 Apr 2026 in “Free Textbook on Engineering Thermodynamics”
Other physics textbooks people recommend
The four most recommended other physics textbooks, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| The Feynman Lectures on Physicsby Feynman, Leighton and Sands | 34 | 3 | 92% | 10 | — | Approved |
| Course of Theoretical Physicsby Landau and Lifshitz | 8 | 1 | 89% | 6 | — | — |
| Computational Physics (2nd Edition)by Giordano and Nakanishi | 7 | 1 | 88% | 1 | — | — |
| Engineering ThermodynamicsThis page | 6 | 0 | 100% | 1 | — | — |
| General Relativityby Robert Wald | 6 | 0 | 100% | 3 | — | — |
What people said
5 of the 7 comments that mention it, newest first. Each links to the original comment.
“All the problems come with answers provided, so I have no excuse!”
“Good to see actual hard science books popularized and available for free.”
“The textbook seems nice and clear.”
“So it's fairly narrow focus, but that is not necessarily a bad thing.”
“You might want to look at optimising the PDF, it's sitting at 40MB right now.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.