Book Edits:
Anywhere from $150-2,000.
It depends if it it is just a read through, small edits or involves extensive research, suggestions, organizational help.
I can provide meetings if in the MD/VA/DC area.
Continuous help and support until the project is complete.

Read Through and Brief Critique
$150-$300

Read Through and Chapter by Chapter Critique:
$150 for read through and $10-20 per chapter critique.

Research for writers or book publishers: $20-40/hour and up; $150 and up per day plus expenses. A flat rate of $300-500 may be charged, depending on complexity of the job.