I cannot work productively with Linux because there are no Linux alternatives to the following Windows tools (and the 'alternatives' people tell me about are a sad joke):
"Being in print" or "new" a is not well-defined in this context. "Being in print" is only a metaphor, since the process of printing is typically completed when a copy of a book is sold (and makes not sense in the case of publishing-on-demand, where it would be equivalent to "is available"); and "new" can mean "in its original condition" or "recently published" (with some uncertainty what time span "recently" denotes).
A more precise criterion would be whether a book is still on its publisher's backlist. As far as "The UNIX Programming Environment" is concerned, the answer is positive. Its publisher Prentice Hall was aquired by Simon & Schuster and later sold to Pearson.[1] On Pearson's Web-site the book is still available.[2]
* AutoHotkey
* Voidtools Everything
* Agent Ransack
* Irfanview