Forge continues the story begun in Chains, and finds teenage slave Curzon fighting for the rebels at Valley Forge after Isabel leaves him. I loved Chains, but I wasn't sure at first that I would enjoy Forge as much because it's told from Curzon's viewpoint, Isabel is absent at the beginning of the book, and I thought the story of battles and a starving winter for soldiers at Valley Forge wouldn't be my kind of book.
I was wrong. This book is absolutely fantastic and gripping and like Chains, what makes it so enjoyable to read is the wonderful characterization. Curzon's voice is so distinctive and often very funny, which means that although I got a strong sense of the soldiers' hunger and extreme physical hardship at Valley Forge it never felt repetitive and the story never dragged.
Curzon makes friends and enemies during his time in the army, but he is always in danger because he knows he isn't free and could be recaptured at any time. He knows that even his friends might think differently of him if they knew he was really a slave, because most of those fighting for freedom for Americans don't think that slaves deserve the same rights.
The story begun in Chains and continued in Forge will be concluded in Ashes, but you don't need to read Chains to follow the events in this book. There is some additional historical information at the end which I enjoyed, but it's not essential to understanding the novel, because Forge stands alone as a brilliant story about a little-known aspect of American history.