The Mammoth Trilogy

The Mammoth Trilogy is a series of books by hard science fiction author Stephen Baxter. The books in it were published between 1999 and 2001. It contains the novels Silverhair, Longtusk and Icebones.

An omnibus volume containing all three novels was released in 2004, with the title Behemoth.

References

http://www.stephen-baxter.com/books.html