
So. If I understand the timing right (cf. rules#Skill_Test_Timing), at ST 3 you realise you're going to fail by one, so you use Book of Verse to get +1 (and later succeed by 0), you then resolve ST4 and ST5, and at ST6 you determine that you succeed by 0. You can then play Daring Maneuver to succeed by 2 instead (3 with Daring Maneuver level 2).
So Book of verse can transform one failure by 1 into a success by 2 or 3 per round, right ?