Concentration for Book of Harms?

[Schrödinger's Dragon]

I was speaking with a friend recently about the preconstructed spellbook called the Book of Harms. We both agreed that it seems underpriced for its effect, a preparation ritual that allows a wizard who prepared at least one spell from the book to spontaneously apply the Maximize Spell feat (whether they have the feat or not) to any one Evocation spell they cast each day without increasing the spell level or casting time, in exchange for taking 1d4 damage per level of the spell. The cost of the book with the ritual is 900 GP.

But my friend asked whether taking the damage from the spell should force the caster to make a concentration check for the spell. It doesn't feel like that would have been the intention of the developer, and in the text it makes no reference to requiring a concentration check because of the damage. I've never seen anybody mention having to make concentration checks to use it either, which makes me think I'm not the only person who had never considered the idea. But by RAW, I think it would, since you're taking damage as you cast a spell, and it somewhat balances the item's low cost since if you don't pass the check then you end up losing the spell and action. On the other hand, I'm not certain how easy or difficult that check is at various levels.

Do you think it is intended for the boon from the Book of Harms to force its user to make a concentration check? If not, do you think that would be a reasonable houserule for a DM to make to balance this item's power?

The preparation ritual's text is included here, for easy reference:

Spoiler:

Harmful Surge (Su) You can maximize a spell, but doing so damages you. Spend this boon effect as a free action when you cast a wizard evocation spell. When you do, you can treat that spell as if it were cast with the Maximize Spell metamagic feat, but you take 1d4 points of damage × the level of the spell that you are maximizing. The damage you take cannot be reduced in any way.

And here are the rules about making a concentration check for taking damage while casting a spell:

Spoiler:

If you take damage while trying to cast a spell, you must make a concentration check with a DC equal to 10 + the damage taken + the level of the spell you’re casting. If you fail the check, you lose the spell without effect. The interrupting event strikes during spellcasting if it comes between the time you started and the time you complete a spell (for a spell with a casting time of 1 full round or more) or if it comes in response to your casting the spell (such as an attack of opportunity provoked by the spell or a contingent attack, such as a readied action).

If you are taking continuous damage, such as from an acid arrow or by standing in a lake of lava, half the damage is considered to take place while you are casting a spell. You must make a concentration check with a DC equal to 10 + 1/2 the damage that the continuous source last dealt + the level of the spell you’re casting. If the last damage dealt was the last damage that the effect could deal, then the damage is over and does not distract you.