"The documents published here are ... to be found in the archives of both the Archdeaconry of Suffolk and the Consistory Court of the diocese of Norwich" -- p. 8.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The Ipswich probate inventories 1583-1631. ISBN 0851151485. Published by the Boydell Press for the Suffolk Records Society in 1981. Publication and catalogue information, links to buy online and reader comments.
