I've just had word from David Flanagan - co-author of The Ruby Programming Language, published by O'Reilly - that O'Reilly are running a temporary sale on the e-book edition. The PDF e-book is now just.. $9.99 for a limited time only. That's a pretty good deal considering O'Reilly are selling the print book for $40 (though it's only $26.39 on Amazon).

Actually.. make that $5.99? Reader Mike Hodgson claims: If you use the LREL40 coupon code you can get an additional $4.00 off, bringing it down to $5.99 - Not tried it myself, but it's worth a go.

The Ruby Programming Language is the canonical Ruby book covering both Ruby 1.8 and 1.9. It's by David Flanagan and Yukihiro Matsumoto (Matz!) so you know it's authoritative. When we reviewed it in 2008, we billed it "the new most important Ruby book."

David also mentions that there's a new iPhone edition available too for a mere $5. A great opportunity to get a great book on the cheap, whatever your budget.

Jumpstart Lab is running a JavaScript Master Class for Javascript & UI programmers with Thomas Fuchs (Scriptaculous, Prototype Core) and Amy Hoy (UI Expert) on 9/12 in Washington, DC. Save 10% with code "rubyinside"!