The first 8 Transformers IDW Collections are a great series of hardcovers reprinting all of the IDW G1 stories (in order) up to the end of the Costa Ongoing.

Been waiting on Vol 9 for a while, but now, Seibertron.Com has reported an Amazon.Com listing for the first in a new series of books called " IDW Collection Phase Two"

The war for Cybertron is over, but Bumblebee and his fellow Autobots struggle to maintain control of a world without Optimus Prime. The provisional government is struggling and Prowl will defend it against the Decepticons at seeminly all costs. Meanwhile, Hot Rod and a group of Autobots and Decepticons embark on an epic quest to the farthest reaches of the Universe. Collects the one-shot Death of Optimus Prime, More Than Meets The Eye issues #1-5, and Robots in Disguise issues #1-6.
As expected the book contains the about 50/50 of the two series, but with RID #6 included, and MTMTE #4 & 5, it's not a replacement for the first trade of each series.

There should be about 6 volumes to take the books through to the end of Dark Cybertron (including the most recent Spotlights). If all works out well, the Dark Cybertron crossover will be in one Hardcover volume (like the Phase One Collection Volume 5 has all of All Hail Megatron).