i have all four of the Mortal Engines series (which some more recent readers may know as the Hungry City Chronicles). they are brilliant books, and i tend to find that whenever someone mentions steampunk books, someone mentions the H.C.Chronicles.
well, i lent my signed copy of the first book; Mortal Engines, to a freind a few years back (before book 2: Predators gold, was released) and havn't seen it since... so i decided to go down to Waterstones today and see if they had any copies in stock, and i found that not only were they in stock, but they have new covers with brilliantly steampunk artwork!
the new covers are on the official Mortal Engines website, and what is even more exiting about this page is the info held within: "Mortal Engines Book 5: Fever Crumb" is released in May!!!
LinkFever Crumb follows the life of an orphan, named Fever crumb, and is set centuries before the events of the Mortal Engines series (yes, they are now the mortal engines series again, instead of the H.C.Chronicles)
there is a chapter of Book 5 on the page i provided above, so enjoy!
by the way, if you click the covers of the original four, they open waterstones pages with larger images (although neither website shows inside the cover, as the art seen through the porthole on each cover is actually a small part of a double page peice on the next page, i will take a photo of the inside of Mortal Engines now to show you guys)
i am considering selling the old ones (as Book 1 was the only signed one, so they have no sentimental value) and buying the new ones, all 4 were in waterstones today, and book 5 is released soon!
(also, Fever is a Girl, so it is good to have a Girl protagonist in the series (as apart from infernal Devices, tom was always the MAIN main character (even in A Darkling plain, Tom and Wren get equal "screen-time")
::EDIT::
although the Mortal Engines site says it is set for a may release, from the looks of waterstones online, it is already available. i didnt see any instore today, but that could be that they have already been brought.