First book still as good as I remember from nearly 40 years ago. Man a small part of the uncaring galaxy. 5 stars
Second book 200 pages to loooong. Needed a editor to cut down the back story of every character. 2 stars.
Book a link to arrive at the last 2 books. One story split into 2 parts. Very inventive and involved. A little surprised at the reason for it all in the slightly rushed ending. 4 stars.

I reread this over the summer after first reading Rendezvous with Rama and Rama II when I was 16 or so. It was an interesting experience going through all the books again some 20 years later. I took completely different things from all four books than I did all those years ago.

This book holds all four Rama books, but only the first one is actually written by Clarke himself, the rest by some d-level author that just screws it all up.

Recommendation: Read only the first book, skip the rest.

Spoilers might be below

Rendezvous with Rama (Rama, #1): Five Stars

This one was written by Clarke and it is fantastic, amazing, awesome, well written, great story, good characters and all above and beyond.

Rama II (Rama, #2): Two Stars

Because the Omnibus does not tell you when one book is finished I was first really confused on why the writing style has changed so much. It turned into some personal drama-lama. Soap Opera. Worse than than some schlock sci-fi b-movie. How such a crew was ever selected that acts like they are in some big brother house is just beyond understanding. While in the first book the mission came first here it is everyone for themselves.

The Garden of Rama (Rama, #3): Two Stars

Same crap as above but now we travel away from earth. Small parts are interesting, overall crap, especially when have that time on that alien space station and the return trip. Forgettable. You realize this book is bad when you start skipping parts and not missing anything.

Rama Revealed (Rama, #4)

One one hand it is the best of the three other books, on the other hand it is the same crap again. It has some nice interesting parts, but it gets all crapped on top with some super-mega-god alien that are behind this. This is just stupid. Also I had to skip over parts because this was just unreadable.