 The "book" is the off-market collation of investor demand by the bookrunner and is confidential to the bookrunner, issuer, and underwriter.Where shares are acquired, or transferred via a bookbuild, the transfer occurs off-market, and the transfer is not guaranteed by an exchange's clearing house.Where an underwriter has been appointed, the underwriter bears the risk of non-payment by an acquirer or non-delivery by the seller.