With all of the existential woe surrounding Book
Quest, I thought I'd offer my data surrounding on it both before and
after the introduction of the new books into the quest. Every day I
recorded the number of Very Rare books asked for, as well as the number
of Publish-a-Book (aka high-payout) books asked for. I completed all
fifty quests every day, at varying times throughout the day as my
schedule allowed. I started recording data on 7/4/2023 and have recorded
 it every day since then. After about two weeks of the new books being
in rotation I'll post my data with the "after" numbers! (Apologies for the wonky formatting, the Res forums hated the table I put it in so it's just raw data here.)

Average Very Rares Asked For: 8.73

Average PABs Asked For: 3.55

Date          VRs    PABS
7/4/2023     13    4
7/5/2023     8    2
7/6/2023     9    1
7/7/2023     8    8
7/8/2023     4    12
7/9/2023     11    6
7/10/2023    6    1
7/11/2023    5    4
7/12/2023    11    3
7/13/2023    5    4
7/14/2023    7    6
7/15/2023    9    3
7/16/2023    9    4
7/17/2023    6    4
7/18/2023    8    1
7/19/2023    9    4
7/20/2023    11    1
7/21/2023    11    6
7/22/2023    8    2
7/23/2023    9    7
7/24/2023    8    3
7/25/2023    10    3
7/26/2023    7    2
7/27/2023    9    3
7/28/2023    4    3
7/29/2023    5    3
7/30/2023    4    2
7/31/2023    8    2
8/1/2023    11    5
8/2/2023    9    2
8/3/2023    14    2
8/4/2023    10    6
8/5/2023    10    5
8/6/2023    6    1
8/7/2023    15    1
8/8/2023    5    4
8/9/2023    11    6
8/10/2023    9    2
8/11/2023    12    2
8/12/2023    8    0
8/13/2023    5    6
8/14/2023    13    3
8/15/2023    13    5
8/16/2023    7    4
8/17/2023    8    2
8/18/2023    10    3
8/19/2023    8    2
8/20/2023    13    5
8/21/2023    9    4

Reserved

8/22 - 3

8/23 - 5 or 6

8/24 - 8+ (I made over 300m on the book quest that day)

8/25 - 2 (I did get asked for How To Hatch a Galta Egg 5 times this day)

8/26 - 1

8/27 - 3

8/28 - 5 or 6

8/29 - 3

8/30 - 3 (accidentally double clicked and it ate one of my turns. As always, hate that glitch)

8/31 - 3

9/1 - 2

9/2 - 3

9/3 - 2

9/4 - 9

9/5 - 4

9/6 - 5

9/7 - 6

9/8 - 2

9/9 - 4

9/10 - 4 or 5

9/11 - 6

9/12 - ?

9/13 - 1?

9/15 - 1

9/16 - 8

9/17 - 4

9/18 - 4+ (forgot to pay any attention at all to the first 25 quests I did)

9/19 - 2

9/20 - 8