For those people injured in minor accidents in Massachusetts, i.e., low medical bills and small damages, I would highly suggest Nolo’s "How To Win Your Personal Injury Claim" written by Attorney Joseph L. Matthews. If you are representing yourself in connection with your injury claim, this book can possibly assist you, assuming the case is a straightforward personal injury claim.
If, on the other hand, you have been involved in an accident where your medical bills exceed $2500.00, I would suggest you hire an attorney for the simple fact that you will almost invariably win more compensation, even after the attorney takes a 1/3 contingency fee off the top, for your personal injury claim.
If you have been involved in a Massachusetts accident and feel that an attorney may be able to assist you, I suggest that you contact a Massachusetts attorney to represent you in your claim.
Here is a link to the Nolo website where you can find the book. I have absolutely no financial interest in this suggestion, and I have no relationship with Nolo in any way. Good luck with your claim!