That has been around for a while. To plan for this apply the tome increase at the level before the minimum level for the tome.
Here is an example showing skill points/level for a 10 starting Int elf LR with a +5 tome and all ability raises into int. A build where you start with an odd base int or raise different stats can take advantage of this but in general starting with raises to int before other stats will give you the most skill points.
Code:Character Plan by DDO Character Planner Version 04.19.01 DDO Character Planner Home Page Level 20 Neutral Good Elf Male (20 Favored Soul) Hit Points: 140 Spell Points: 1725 BAB: 15\15\20\25\25 Fortitude: 10 Reflex: 12 Will: 11 Starting Ending Abilities Base Stats Base Stats (28 Point) (Level 1) (Level 20) Strength 8 8 Dexterity 10 10 Constitution 6 6 Intelligence 10 20 Wisdom 8 8 Charisma 8 8 Tomes Used +1 Tome of Intelligence used at level 2 +2 Tome of Intelligence used at level 6 +3 Tome of Intelligence used at level 10 +4 Tome of Intelligence used at level 14 +5 Tome of Intelligence used at level 18 Level 1 (Favored Soul) Skill: Concentration (+2) (I did not take advantage of 4x skill point at 1st lvl for this demonstration) Level 2 (Favored Soul) Skill: Diplomacy (+2) Level 3 (Favored Soul) Skill: Heal (+2) Level 4 (Favored Soul) Ability Raise: INT Skill: Jump (+3) Level 5 (Favored Soul) Skill: Spellcraft (+3) Level 6 (Favored Soul) Skill: Concentration (+3) Level 7 (Favored Soul) Skill: Diplomacy (+3) Level 8 (Favored Soul) Ability Raise: INT Skill: Heal (+4) Level 9 (Favored Soul) Skill: Jump (+4) Level 10 (Favored Soul) Skill: Spellcraft (+4) Level 11 (Favored Soul) Skill: Concentration (+4) Level 12 (Favored Soul) Ability Raise: INT Skill: Diplomacy (+5) Level 13 (Favored Soul) Skill: Heal (+5) Level 14 (Favored Soul) Skill: Jump (+5) Level 15 (Favored Soul) Skill: Spellcraft (+5) Level 16 (Favored Soul) Ability Raise: INT Skill: Concentration (+6) Level 17 (Favored Soul) Skill: Diplomacy (+6) Level 18 (Favored Soul) Skill: Heal (+6) Level 19 (Favored Soul) Skill: Jump (+6) Level 20 (Favored Soul) Ability Raise: INT Skill: Spellcraft (+7)