I am still using the first edition of NR (with code in FORTRAN) and am thinking it is about time I updated to the third edition. However, I am wondering if perhaps a fourth edition (with C code) might be coming out soon, in which case I should wait.

So . . .
Two questions:
Is a Fourth Edition of NR planned?
(If so, any idea when it will be publicly available?)

Hi, DavidB!
The new Third Edition just came out last fall, and we usually do a new edition only every decade or so, so there are no plans for any further edition. Also, we pretty much decided to get out of the multiple languages side, so C++ is all there is (or, foreseeably, will be).
HTH.
Cheers,
Bill P.

Hi, it's been awhile since the 3rd edition release. May I know if 4th edition will be releasing soon?

No plans for a 4th edition. We're still pretty happy with the 3rd edition, and wouldn't change much of anything!

Cheers,
Bill P.